How many rules are there for modern soccer?
Laws of the Game (association football)
The actual law book had long contained 50 pages more of material, organized in numerous sections, that included many diagrams but were not officially part of the main 17 laws. In 2007, many of these additional sections along with much of the material from the FIFA Questions and Answers (Q&A), were restructured and put into a new "Additional Instructions and Guidelines for the Referee" section. In the 2016/2017 revision of the Laws, the material from this section was folded into the Laws themselves.
List of gridiron football rules
The most notable rule difference in the CIFL from other indoor football leagues is that the CIFL plays seven players to a side, as opposed to most indoor leagues, which play eight men to a side.