Officials' signals (see pages 166 - 168), the numbers refer to numbered illustrations; R, Rule; S, Section; A, Article; P, Page. Where a signal is marked *, the referee shall also give Signal 9.
| Index | O | R | S | A | P | |
|---|---|---|---|---|---|---|
| LOSS OF A DOWN | ||||||
| 1 | Illegal scrimmage kick | 31* | 6 | 3 | 10 | 96 |
| 2 | Illegally handing ball forward | 35* | 7 | 1 | 6 | 109 |
| 3 | Planned loose ball play | 19* | 7 | 1 | 7 | 110 |
| 4 | Intentionally throwing backward pass out of bounds | 35* | 7 | 2 | 1 | 110 |
| 5 | Illegal forward pass by Team A | 35* | 7 | 3 | 2 | 111 |
| 6 | Intentionally grounding forward pass | 36* | 7 | 3 | 2 | 112 |
| 7 | Forward pass illegally touched by player out of bounds | 16* | 7 | 3 | 4 | 113 |
| 8 | Forward pass illegally touched | 16* | 7 | 3 | 11 | 119 |
| 9 | Illegally batting loose ball | 31* | 9 | 4 | 1 | 151 |
| 10 | Illegally kicking ball | 31* | 9 | 4 | 4 | 153 |
| LOSS OF FIVE YARDS | ||||||
| 1 | Alteration of playing surface for an advantage | 19 | 1 | 2 | 9 | 20 |
| 2 | Improper numbering | 23 | 1 | 4 | 2 | 23 |
| 3 | Coin toss infractions | 19 | 3 | 1 | 1 | 52 |
| 4 | Illegal delay of game | 21 | 3 | 4 | 2 | 70 |
| 5 | Advancing a dead ball | 21 | 3 | 4 | 2 | 70 |
| 6 | Disconcerting offensive signals | 21 | 3 | 4 | 2 | 70 |
| 7 | Substitution rules infraction (live-ball) | 22 | 3 | 5 | 2 | 73 |
| 8 | Substitution rules infraction (dead-ball) | 22 | 3 | 5 | 2 | 74 |
| 9 | Delay of game (substitutions) | 21 | 3 | 5 | 2 | 74 |
| 10 | More than 11 players in the formation or during the play (Team A) | 22 | 3 | 5 | 3 | 75 |
| 11 | More than 11 players in the formation or during the play (Team B) | 26 | 3 | 5 | 3 | 75 |
| 12 | More than 11 players when the play clock expires | 22 | 3 | 5 | 3 | 76 |
| 13 | Putting ball in play before it is ready | 19 | 4 | 1 | 4 | 82 |
| 14 | Exceeding play clock count | 21 | 4 | 1 | 5 | 82 |
| 15 | Infraction of free kick formation | 18, 19 | 6 | 1 | 2 | 88 |
| 16 | Player out of bounds when ball free-kicked | 19 | 6 | 1 | 2 | 89 |
| 17 | Team A player illegally goes out of bounds (free kick) | 19 | 6 | 1 | 11 | 92 |
| 18 | Team A blocking during a free kick | 19 | 6 | 1 | 12 | 92 |
| 19 | Free kick out of bounds | 19 | 6 | 2 | 1 | 92 |
| 20 | Return kick | 31 | 6 | 3 | 10 | 96 |
| 21 | Illegal scrimmage kick (also loss of down) | 31* | 6 | 3 | 10 | 96 |
| 22 | Marking spot of place kick | 19 | 6 | 3 | 10 | 96 |
| 23 | Team A player illegally goes out of bounds (scrimmage kick) | 19 | 6 | 3 | 12 | 97 |
| 24 | Defensive linemen in field goal formation | 19 | 6 | 3 | 14 | 98 |
| 25 | Taking more than two steps after a fair catch | 21 | 6 | 5 | 2 | 101 |
| 26 | Illegal snap | 19 | 7 | 1 | 1 | 104 |
| 27 | Snapper's position and ball adjustment | 19 | 7 | 1 | 3 | 105 |
| 28 | Team A not within nine-yard marks after ready for play | 19 | 7 | 1 | 3 | 105 |
| 29 | Encroachment (offense) at snap | 19 | 7 | 1 | 3 | 105 |
| 30 | False start or simulating start of a play | 19 | 7 | 1 | 3 | 105 |
| 31 | Player out of bounds when ball is snapped | 19 | 7 | 1 | 4 | 107 |
| 32 | Offensive player illegally in motion at the snap | 20 | 7 | 1 | 4 | 107 |
| 33 | Illegal formation | 19 | 7 | 1 | 4 | 107 |
| 34 | Illegal formation due to numbering exception | 19 | 7 | 1 | 4 | 107 |
| 35 | Illegal shift | 20 | 7 | 1 | 4 | 107 |
| 36 | Interference with opponent or ball | 18 | 7 | 1 | 5 | 108 |
| 37 | Defensive player charging unabated toward a back | 18 | 7 | 1 | 5 | 108 |
| 38 | Abrupt defensive actions | 21 | 7 | 1 | 5 | 108 |
| 39 | Offside (defense) | 18 | 7 | 1 | 5 | 109 |
| 40 | Defensive player out of bounds at snap | 19 | 7 | 1 | 5 | 109 |
| 41 | Illegally handing ball forward (also loss of down) | 35* | 7 | 1 | 6 | 109 |
| 42 | Planned loose ball play (also loss of down) | 19* | 7 | 1 | 7 | 110 |
| 43 | Intentionally throwing backward pass out of bounds (also loss of down) | 35* | 7 | 2 | 1 | 110 |
| 44 | Player on scrimmage line receiving snap | 19 | 7 | 2 | 3 | 110 |
| 45 | Illegal forward pass by Team A (also loss of down) | 35* | 7 | 3 | 2 | 111 |
| 46 | Ineligible receiver downfield | 37 | 7 | 3 | 10 | 119 |
| 47 | Forward pass illegally touched (also loss of down) | 16* | 7 | 3 | 11 | 119 |
| 48 | Running into the kicker or holder | 30 | 9 | 1 | 16 | 140 |
| 49 | Game administration interference (also 15 yards) | 21,29 | 9 | 2 | 5 | 147 |
| 50 | Interlocked interference or helping ball carrier | 44 | 9 | 3 | 2 | 148 |
| LOSS OF 10 YARDS | ||||||
| 1 | Home team delay | 21 | 3 | 4 | 1 | 69 |
| 2 | Illegal block by fair catch signaller | 40 | 6 | 5 | 4 | 102 |
| 3 | Illegal use of hands or arms (offense) | 42 | 9 | 3 | 3 | 149 |
| 4 | Holding or obstruction (offense) | 42 | 9 | 3 | 3 | 149 |
| 5 | Locked hands | 42 | 9 | 3 | 3 | 149 |
| 6 | Illegal use of hands (defense) (first down) | 42 | 9 | 3 | 4 | 150 |
| 7 | Holding or obstruction (defense) (first down) | 42 | 9 | 3 | 4 | 150 |
| 8 | Illegal block in the back | 43 | 9 | 3 | 5 | 151 |
| 9 | Illegally batting loose ball (also loss of down) | 31* | 9 | 4 | 1 | 151 |
| 10 | Illegally batting a backward pass | 31 | 9 | 4 | 2 | 152 |
| 11 | Batting a ball in possession by player in possession | 31 | 9 | 4 | 3 | 152 |
| 12 | Illegally kicking ball (also loss of down) | 31* | 9 | 4 | 4 | 153 |
| LOSS OF 15 YARDS | ||||||
| 1 | Marking ball | 27 | 1 | 3 | 3 | 22 |
| 2 | Numbers changed (also disqualification) | 27 | 1 | 4 | 2 | 23 |
| 3 | Improper colours | 27 | 1 | 4 | 5 | 25 |
| 4 | Illegal signal devices (also disqualification) | 27, 47 | 1 | 4 | 10 | 29 |
| 5 | Eavesdropping (also disqualification) | 27, 47 | 1 | 4 | 13 | 30 |
| 6 | Team not ready to play at start of either half | 21 | 3 | 4 | 1 | 69 |
| 7 | Rapid substitution to opponent's disadvantage | 27 | 3 | 5 | 2 | 74 |
| 8 | Blocking a free kicker | 40 | 6 | 1 | 9 | 91 |
| 9 | Illegal wedge | 27 | 6 | 1 | 10 | 91 |
| 10 | Interference with opportunity to catch kick | 33 | 6 | 4 | 1 | 99 |
| 11 | Tackling or blocking fair catcher | 38 | 6 | 5 | 5 | 102 |
| 12 | Offensive pass interference | 33 | 7 | 3 | 8 | 116 |
| 13 | Defensive pass interference (first down) | 33 | 7 | 3 | 8 | 116 |
| 14 | Personal foul (first down) | 38 | 9 | 1 | 0 | 131 |
| 15 | Striking an opponent (first down) | 38 | 9 | 1 | 2 | 131 |
| 16 | Tripping (first down) | 46 | 9 | 1 | 2 | 131 |
| 17 | Targeting/forcible contact with crown of helmet (first down) (also disqualification) | 24, 38, 47 | 9 | 1 | 3 | 132 |
| 18 | Forcible contact to head/neck area of a defenseless player (first down) (also disqualification) | 24, 38, 47 | 9 | 1 | 4 | 132 |
| 19 | Clipping (first down) | 39 | 9 | 1 | 5 | 134 |
| 20 | Blocking below the waist (first down) | 40 | 9 | 1 | 6 | 134 |
| 21 | Late hit (first down) | 38 | 9 | 1 | 7 | 136 |
| 22 | Action out of bounds (first down) | 38 | 9 | 1 | 7 | 136 |
| 23 | Helmet/face mask fouls (first down) | 38, 45 | 9 | 1 | 8 | 136 |
| 24 | Roughing the passer (first down) | 34 | 9 | 1 | 9 | 137 |
| 25 | Chop blocking (first down) | 41 | 9 | 1 | 10 | 137 |
| 26 | Leverage/Leaping (first down) | 38 | 9 | 1 | 11 | 138 |
| 27 | Defensive restrictions | 27 | 9 | 1 | 11 | 138 |
| 28 | Fouling an opponent obviously out of the play (first down) | 38 | 9 | 1 | 12 | 138 |
| 29 | Hurdling (first down) | 38 | 9 | 1 | 13 | 138 |
| 30 | Illegal contact against the snapper (first down) | 38 | 9 | 1 | 14 | 138 |
| 31 | Horse-collar tackle (first down) | 25, 38 | 9 | 1 | 15 | 139 |
| 32 | Roughing the kicker or holder (first down) | 30, 38 | 9 | 1 | 16 | 140 |
| 33 | Simulating roughed or run into | 27 | 9 | 1 | 16 | 140 |
| 34 | Blocking a free kicker | 40 | 9 | 1 | 16 | 140 |
| 35 | Continued participation without a helmet (first down) | 38 | 9 | 1 | 17 | 141 |
| 36 | Illegal blind-side block (first down) | 38 | 9 | 1 | 18 | 141 |
| 37 | Unsportsmanlike conduct (first down) | 27 | 9 | 2 | 1 | 142 |
| 38 | Obscene or vulgar language | 27 | 9 | 2 | 1 | 142 |
| 39 | Persons illegally on the field | 27 | 9 | 2 | 1 | 142 |
| 40 | Provoking ill will | 27 | 9 | 2 | 1 | 142 |
| 41 | Player not returning ball to official | 27 | 9 | 2 | 1 | 142 |
| 42 | Persons leaving team area | 27 | 9 | 2 | 1 | 143 |
| 43 | Noise by persons subject to the rules | 27 | 9 | 2 | 1 | 143 |
| 44 | Concealing the ball | 27 | 9 | 2 | 2 | 144 |
| 45 | Simulated replacements or substitutions | 27 | 9 | 2 | 2 | 144 |
| 46 | Equipment to confuse opponents | 27 | 9 | 2 | 2 | 144 |
| 47 | Unusual action or verbiage to confuse opponents | 27 | 9 | 2 | 2 | 144 |
| 48 | Simulating injury to confuse opponents or officials | 27 | 9 | 2 | 2 | 144 |
| 49 | More than one player with same number | 27 | 9 | 2 | 2 | 144 |
| 50 | Intentionally contacting an official (also disqualification) | 27, 47 | 9 | 2 | 4 | 146 |
| 51 | Game administration interference (also 5 yards) | 27,29 | 9 | 2 | 5 | 147 |
| 52 | Physical interference with an official | 27 | 9 | 2 | 5 | 147 |
| 53 | Fighting (first down) (also disqualification) | 27, 38, 47 | 9 | 5 | 1 | 153 |
| LOSS OF HALF DISTANCE TO GOAL LINE | ||||||
| 1 | If distance penalty exceeds half the distance (except on defensive pass interference) | - | 10 | 2 | 6 | 161 |
| OFFENDED TEAM'S BALL AT SPOT OF FOUL | ||||||
| 1 | Defensive pass interference (if less than a 15-yard penalty) (first down) | 33 | 7 | 3 | 8 | 116 |
| CHARGED TIMEOUT FOR A VIOLATION | ||||||
| 1 | Illegal jersey numbers | 27 | 1 | 4 | 5 | 25 |
| 2 | Not wearing mandatory equipment | 23 | 1 | 4 | 8 | 28 |
| 3 | Wearing illegal equipment | 23 | 1 | 4 | 8 | 28 |
| 4 | Head coach's conference | 21 | 3 | 3 | 4 | 64 |
| 5 | Player presents as injured after ball is spotted | 3 | 3 | 3 | 6 | 65 |
| 6 | Head coach's review | 21 | 12 | 1 | 1 | 164 |
| VIOLATION | ||||||
| 1 | Illegal touching of free kick by kicking team | 16 | 6 | 1 | 3 | 90 |
| 2 | Illegal touching of scrimmage kick by kicking team | 16 | 6 | 3 | 2 | 94 |
| 3 | Scrimmage-kick-batting exception | 16 | 6 | 3 | 11 | 96 |
| DISQUALIFICATION | ||||||
| 1 | Prohibited signal devices | 47 | 1 | 4 | 10 | 29 |
| 2 | Eavesdropping | 47 | 1 | 4 | 13 | 30 |
| 3 | Flagrant fouls | 47 | 9 | 1 | 1 | 131 |
| 4 | Targeting/forcible contact with crown of helmet | 38 | 9 | 1 | 3 | 132 |
| 5 | Forcible contact to head/neck area of a defenseless player | 38 | 9 | 1 | 4 | 132 |
| 6 | Intentionally contacting an official | 47 | 9 | 2 | 4 | 146 |
| 7 | Two unsportsmanlike fouls | 47 | 9 | 2 | 6 | 147 |
| 8 | Fighting | 47 | 9 | 5 | 1 | 153 |
| AUTOMATIC FIRST DOWNS (DEFENSIVE FOULS) | ||||||
| 1 | Defensive pass interference | 33 | 7 | 3 | 8 | 116 |
| 2 | Defensive pass interference (if less than a 15-yard penalty) | 33 | 7 | 3 | 8 | 116 |
| 3 | Personal foul | 38 | 9 | 1 | 0 | 131 |
| 4 | Striking an opponent | 38 | 9 | 1 | 2 | 131 |
| 5 | Tripping | 46 | 9 | 1 | 2 | 131 |
| 6 | Targeting/forcible contact with crown of helmet (also disqualification) | 24, 38, 47 | 9 | 1 | 3 | 132 |
| 7 | Forcible contact to head/neck area of a defenseless player (also disqualification) | 24, 38, 47 | 9 | 1 | 4 | 132 |
| 8 | Clipping | 39 | 9 | 1 | 5 | 134 |
| 9 | Blocking below the waist | 40 | 9 | 1 | 6 | 134 |
| 10 | Late hit | 38 | 9 | 1 | 7 | 136 |
| 11 | Action out of bounds | 38 | 9 | 1 | 7 | 136 |
| 12 | Helmet/face mask fouls | 38, 45 | 9 | 1 | 8 | 136 |
| 13 | Roughing the passer | 34 | 9 | 1 | 9 | 137 |
| 14 | Chop blocking | 41 | 9 | 1 | 10 | 137 |
| 15 | Leverage/Leaping | 38 | 9 | 1 | 11 | 138 |
| 16 | Fouling an opponent obviously out of the play | 38 | 9 | 1 | 12 | 138 |
| 17 | Hurdling | 38 | 9 | 1 | 13 | 138 |
| 18 | Illegal contact against the snapper | 38 | 9 | 1 | 14 | 138 |
| 19 | Horse-collar tackle | 25, 38 | 9 | 1 | 15 | 139 |
| 20 | Roughing the kicker or holder | 30, 38 | 9 | 1 | 16 | 140 |
| 21 | Continued participation without a helmet | 38 | 9 | 1 | 17 | 141 |
| 22 | Illegal blind-side block | 38 | 9 | 1 | 18 | 141 |
| 23 | Unsportsmanlike conduct | 27 | 9 | 2 | 1 | 142 |
| 24 | Illegal use of hands (defense) | 42 | 9 | 3 | 4 | 150 |
| 25 | Holding or obstruction (defense) | 42 | 9 | 3 | 4 | 150 |
| 26 | Fighting (also disqualification) | 27, 38, 47 | 9 | 5 | 1 | 153 |
| REFEREE'S DISCRETION | ||||||
| 1 | Penalty for unfair acts | 27 | 9 | 2 | 3 | 146 |
| WHEN IN QUESTION RULES | ||||||
| 1 | Block below waist contact is below waist | - | 2 | 3 | 2 | 33 |
| 2 | Block in the back contact is at or below waist | - | 2 | 3 | 4 | 33 |
| 3 | Catch, recovery or interception not completed | - | 2 | 4 | 3 | 35 |
| 4 | Ball accidentally touched rather than batted | - | 2 | 11 | 3 | 38 |
| 5 | Ball not touched on kick or forward pass | - | 2 | 11 | 4 | 38 |
| 6 | Ball accidentally touched rather than kicked | - | 2 | 16 | 1 | 40 |
| 7 | Forward pass rather than backward pass | - | 2 | 19 | 2 | 42 |
| 8 | Forward pass and not fumble | - | 2 | 19 | 2 | 43 |
| 9 | It is a catchable forward pass | - | 2 | 19 | 4 | 43 |
| 10 | A player is defenseless | - | 2 | 27 | 14 | 48 |
| 11 | Stop clock for injured player | - | 3 | 3 | 6 | 65 |
| 12 | Forward progress stopped | - | 4 | 1 | 3 | 80 |
| 13 | Kick-catch interference | - | 6 | 4 | 1 | 99 |
| 14 | It is a catchable forward pass | - | 7 | 3 | 8 | 116 |
| 15 | Touchback rather than safety | - | 8 | 5 | 1 | 127 |
| 16 | Twisting, turning or pulling face mask (helmet opening) | - | 9 | 1 | 8 | 136 |
| 17 | Roughing kicker rather than running into | - | 9 | 1 | 16 | 140 |
Alphabetically by code:
| Code | Foul | |
|---|---|---|
| APS | Altering playing surface | |
| ATR | Assisting the runner | |
| BAT | Illegal batting | |
| DEH | Holding, defense | |
| DOD | Delay of game, defense | |
| DOF | Offside, defense | |
| DOG | Delay of game, offense | |
| DPI-AB | Pass interference, defense, arm bar | |
| DPI-CO | Pass interference, defense, cut off | |
| DPI-GR | Pass interference, defense, grab and restrict | |
| DPI-HT | Pass interference, defense, hook and turn | |
| DPI-NPB | Pass interference, defense, not playing the ball | |
| DPI-PTO | Pass interference, defense, playing through opponent | |
| DSH | Delay of game, start of half | |
| DSQ | Disqualification | |
| ENC | Encroachment (offense) | |
| FGT | Fighting | |
| FST | False start | |
| IBB | Illegal block in the back | |
| IBK | Illegal block during kick | |
| IBP | Illegal backward pass | |
| IDP | Ineligible downfield on pass | |
| IFD | Illegal formation, defense (3-on-1) | |
| IFH | Illegal forward handing | |
| IFK | Illegal free kick formation | |
| IFP | Illegal forward pass | |
| IKB | Illegally kicking ball | |
| ILF | Illegal formation | |
| ILM | Illegal motion | |
| ING | Intentional grounding | |
| IPN | Improper numbering | |
| IPR | Illegal procedure | |
| ISH | Illegal shift | |
| ISP | Illegal snap | |
| ITP | Illegal touching of a forward pass | |
| IUH | Illegal use of hands | |
| IWK | Illegal wedge on kickoff | |
| KCI | Kick-catch interference | |
| KIK | Illegal kick | |
| KOB | Free kick out of bounds | |
| OBK | Out of bounds during kick | |
| OFH-GR | Holding, offense, grab and restrict | |
| OFH-HR | Holding, offense, hook and restrict | |
| OFH-TD | Holding, offense, takedown | |
| OFK | Offside, free kick | |
| OPI-BK | Pass interference, offense, blocking | |
| OPI-DT | Pass interference, offense, driving through | |
| OPI-PK | Pass interference, offense, pick | |
| OPI-PO | Pass interference, offense, pushing off | |
| PF-BBW | Personal foul, blocking below the waist | |
| PF-BOB | Personal foul, blocking out of bounds | |
| PF-BSB | Personal foul, blind-side block | |
| PF-BTH | Personal foul, blow to the head | |
| PF-CHB | Personal foul, chop block | |
| PF-CLP | Personal foul, clipping | |
| PF-FMM | Personal foul, face mask | |
| PF-HCT | Personal foul, horse collar tackle | |
| PF-HDR | Personal foul, hit on defenseless receiver | |
| PF-HTF | Personal foul, hands to the face | |
| PF-HUR | Personal foul, hurdling | |
| PF-ICS | Personal foul, illegal contact with snapper | |
| PF-LEA | Personal foul, leaping | |
| PF-LHP | Personal foul, late hit/piling on | |
| PF-LTO | Personal foul, late hit out of bounds | |
| PF-OTH | Personal foul, other | |
| PF-RFK | Personal foul, roughing free kicker | |
| PF-RTH | Personal foul, roughing the holder | |
| PF-RTK | Personal foul, roughing the kicker | |
| PF-RTP | Personal foul, roughing the passer | |
| PF-SKE | Personal foul, striking/kneeing/elbowing | |
| PF-TGB | Personal foul, targeting (both Rules 9-1-3 and 4) | |
| PF-TGC | Personal foul, targeting (crown of helmet) | |
| PF-TGD | Personal foul, targeting (defenseless player) | |
| PF-TRP | Personal foul, tripping | |
| PF-UNR | Personal foul, unnecessary roughness | |
| RNH | Running into the holder | |
| RNK | Running into the kicker | |
| SLI | Sideline interference, 5 yards | |
| SLM | Sideline interference, 15 yards | |
| SLW | Sideline interference, warning | |
| SUB | Illegal substitution | |
| UC-2PN | Unsportsmanlike conduct, two players with same number | |
| UC-ABL | Unsportsmanlike conduct, abusive language | |
| UC-BCH | Unsportsmanlike conduct, bench | |
| UC-DBS | Unsportsmanlike conduct, dead ball shoving | |
| UC-DEA | Unsportsmanlike conduct, delayed/excessive act | |
| UC-FCO | Unsportsmanlike conduct, forcibly contacting an official | |
| UC-RHT | Unsportsmanlike conduct, removal of helmet | |
| UC-SBR | Unsportsmanlike conduct, simulating being roughed | |
| UC-STB | Unsportsmanlike conduct, spiking/throwing ball | |
| UC-TAU | Unsportsmanlike conduct, taunting/baiting | |
| UC-UNS | Unsportsmanlike conduct, other | |
| UFA | Unfair acts | |
| UFT | Unfair tactics | |
Alphabetically by foul:
| Code | Foul | |
|---|---|---|
| APS | Altering playing surface | |
| ATR | Assisting the runner | |
| DOD | Delay of game, defense | |
| DOG | Delay of game, offense | |
| DSH | Delay of game, start of half | |
| DSQ | Disqualification | |
| ENC | Encroachment (offense) | |
| FST | False start | |
| FGT | Fighting | |
| KOB | Free kick out of bounds | |
| DEH | Holding, defense | |
| OFH-GR | Holding, offense, grab and restrict | |
| OFH-HR | Holding, offense, hook and restrict | |
| OFH-TD | Holding, offense, takedown | |
| IBP | Illegal backward pass | |
| BAT | Illegal batting | |
| IBK | Illegal block during kick | |
| IBB | Illegal block in the back | |
| ILF | Illegal formation | |
| IFD | Illegal formation, defense (3-on-1) | |
| IFH | Illegal forward handing | |
| IFP | Illegal forward pass | |
| IFK | Illegal free kick formation | |
| KIK | Illegal kick | |
| IKB | Illegally kicking ball | |
| ILM | Illegal motion | |
| IPR | Illegal procedure | |
| ISH | Illegal shift | |
| ISP | Illegal snap | |
| SUB | Illegal substitution | |
| ITP | Illegal touching of a forward pass | |
| IUH | Illegal use of hands | |
| IWK | Illegal wedge on kickoff | |
| IPN | Improper numbering | |
| IDP | Ineligible downfield on pass | |
| ING | Intentional grounding | |
| KCI | Kick-catch interference | |
| DOF | Offside, defense | |
| OFK | Offside, free kick | |
| OBK | Out of bounds during kick | |
| DPI-AB | Pass interference, defense, arm bar | |
| DPI-CO | Pass interference, defense, cut off | |
| DPI-GR | Pass interference, defense, grab and restrict | |
| DPI-HT | Pass interference, defense, hook and turn | |
| DPI-NPB | Pass interference, defense, not playing the ball | |
| DPI-PTO | Pass interference, defense, playing through opponent | |
| OPI-BK | Pass interference, offense, blocking | |
| OPI-DT | Pass interference, offense, driving through | |
| OPI-PK | Pass interference, offense, pick | |
| OPI-PO | Pass interference, offense, pushing off | |
| PF-BSB | Personal foul, blind-side block | |
| PF-BBW | Personal foul, blocking below the waist | |
| PF-BOB | Personal foul, blocking out of bounds | |
| PF-BTH | Personal foul, blow to the head | |
| PF-CHB | Personal foul, chop block | |
| PF-CLP | Personal foul, clipping | |
| PF-FMM | Personal foul, face mask | |
| PF-HTF | Personal foul, hands to the face | |
| PF-HDR | Personal foul, hit on defenseless receiver | |
| PF-HCT | Personal foul, horse collar tackle | |
| PF-HUR | Personal foul, hurdling | |
| PF-ICS | Personal foul, illegal contact with snapper | |
| PF-LTO | Personal foul, late hit out of bounds | |
| PF-LHP | Personal foul, late hit/piling on | |
| PF-LEA | Personal foul, leaping | |
| PF-OTH | Personal foul, other | |
| PF-RFK | Personal foul, roughing free kicker | |
| PF-RTH | Personal foul, roughing the holder | |
| PF-RTK | Personal foul, roughing the kicker | |
| PF-RTP | Personal foul, roughing the passer | |
| PF-SKE | Personal foul, striking/kneeing/elbowing | |
| PF-TGB | Personal foul, targeting (both Rules 9-1-3 and 4) | |
| PF-TGC | Personal foul, targeting (crown of helmet) | |
| PF-TGD | Personal foul, targeting (defenseless player) | |
| PF-TRP | Personal foul, tripping | |
| PF-UNR | Personal foul, unnecessary roughness | |
| RNH | Running into the holder | |
| RNK | Running into the kicker | |
| SLI | Sideline interference, 5 yards | |
| SLM | Sideline interference, 15 yards | |
| SLW | Sideline interference, warning | |
| UFA | Unfair acts | |
| UFT | Unfair tactics | |
| UC-ABL | Unsportsmanlike conduct, abusive language | |
| UC-BCH | Unsportsmanlike conduct, bench | |
| UC-DBS | Unsportsmanlike conduct, dead ball shoving | |
| UC-DEA | Unsportsmanlike conduct, delayed/excessive act | |
| UC-FCO | Unsportsmanlike conduct, forcibly contacting an official | |
| UC-UNS | Unsportsmanlike conduct, other | |
| UC-RHT | Unsportsmanlike conduct, removal of helmet | |
| UC-SBR | Unsportsmanlike conduct, simulating being roughed | |
| UC-STB | Unsportsmanlike conduct, spiking/throwing ball | |
| UC-TAU | Unsportsmanlike conduct, taunting/baiting | |
| UC-2PN | Unsportsmanlike conduct, two players with same number | |
Code PF-BTH has been deprecated (as of 2026) in favour of the three PF-TG* codes.