Well I don't think it is unreadable at least. It lists the rule and the signal at the end of each line.
PENALTY SUMMARY
LOSS OF 5 YARDS Reference Signal
1. Failure to properly wear required equipment during down................…….....….1-5-6 27-23
2. Delay of game ...............................................................................……3-6-2,5; 6-5-5 7-21
3. Failure to properly wear required equipment just before snap..........….......….3-6-2d 7-21-23
4. Illegal substitution ..............................................................................…….......….3-7 22
5. Free-kick infraction .............................................................................…...……6-1-2 7-19
6. Encroachment............................................................................……6-1-3; 7-1-1, 5, 6 7-18
7. Free kick out of bounds ...................................................................…................6-1-8 19
8. Invalid or illegal fair-catch signal ..................................................….........…6-5-7, 8 32
9. Snap infraction.................................................................................….....…...7-1-2, 3 7-19
10. False Start………………………………...................……………………………….……..7-1-7 7-19
11. Illegal formation……………………………...................………….………………....7-2-1, 2, 3 19
12. Less than seven players on A’s line or numbering violation..........…...........…7-2-5 19
13. Illegal shift or illegal motion….........................................................….........7-2-6, 7 20
14. Planned loose-ball infraction ..........................................................…......……7-2-8 19
15. Illegally handing ball forward (also loss of down).........................…......….7-3-2, 3 35-9
16. Illegal forward pass (if by A) (also loss of down)..........................…....………7-5-2 35-9
17. Illegal forward pass (if by B) .........................................................…..……..…7-5-2 35
18. Intentional grounding (also loss of down).....................................…...…...7-5-2c, d 36-9
19. Ineligible receiver illegally downfield............................................…........….7-5-12 37
20. Illegal touching (also loss of down) .............................................……...........7-5-13 16
21. Helping runner .............................................................................……...........…..9-1 44
22. Incidental face mask ...................................................................….........…..…9-4-3 45
23. Running into kicker/holder ........................................................…..............….9-4-5 30
24. Sideline interference .................................................................….............….9-8-1k 7-29
25. Attendant illegally on field..........................................................…...........……9-8-2 19
26. Non-player outside of the team box, but not on field.................…...............….9-8-3 7-29
LOSS OF 10 YARDS
1. Illegal blocking technique .........................................................……..9-2-1a; 9-2-3a 42
2. Interlocked blocking ............................................................................………9-2-1b 44
3. Holding ...................................................................................……….9-2-1c; 9-2-3d 42
4. Runner grasping a teammate ...........................................................….………..9-2-2 42
5. Illegal use of hands or arms ..........................................................………9-2-3a, b, d 42
6. Illegal block in the back .....................................................................…….…...9-3-5 43
LOSS OF 15 YARDS
1. Unsportsmanlike conduct by player or non-player ....................…….1-5-2, 3, 5; 9-5, 9-8-1 27
2. Illegally kicking or batting ball...............................................................…..6-2-1; 9-7 31
3. Illegal block after valid or invalid fair-catch signal.......................………6-5-1; 9-3-3 40
4. Kick-catching interference ...................................................................…………6-5-6 33
5. Forward-pass interference (loss of down if by A - give
signal 33 and 9; also first down if by B) ..................................................……..7-5-10 33
If intentional an additional 15 yards.........................................................……..7-5-10 27
6. Illegal block below waist or on free-kicker or holder…..........................…….9-3-2, 4 40
7. Clipping...................................................................................................………..9-3-5 39
8. Chop block............................................................................................………….9-3-6 41
9. Tripping ..................................................................................................………..9-3-7 46
10. Illegal personal contact .........................................................................………..9-4-3 38
11. Charging into an opponent obviously out of the play .........................………....9-4-3 38
12. Grasping an opponent’s face mask (or any helmet opening) ................………..9-4-3 38-45
13. Butt block, face tackle or spear..............................................................………..9-4-3 24
14. Roughing passer (also first down) ........................................................………...9-4-4 34
15. Roughing kicker or holder (also first down).........................................………...9-4-5 38-30
16. Roughing snapper (also first down).........................................................………9-4-6 38
17. Slapping blocker’s head .........................................................................……….9-4-7 38
18. Illegal participation ...................................................................................………..9-6 28
19. Sideline interference (third and subsequent).......................................……...9-8-1k, 3 7-29-27
20. Non-player illegally on field.......................................................................……..9-8-3 27
DISQUALIFICATION ASSOCIATED WITH CERTAIN 15-YARD PENALTIES
1. Fighting by player or non-player ............................................................………...9-4-1 38-47
2. Intentionally contacting an official.............................................................………9-4-2 38-47
3. Striking, kicking, kneeing .......................................................................………..9-4-3 38-47
4. Any act if unduly rough or flagrant (give proper signal
and follow with 47)...............................................................................…………….9-4 47
5. A second unsportsmanlike foul by player or non-player .......................………...9-5, 8 27-47
6. A substitute leaving team box during a fight..........................................…..…....9-8-1l 27-47