[Kracken]

1. PARTICIPATION; Article 4; Section D: It is illegal participation to use a player, replaced player, substitute, coach, athletic trainer or other attendant in a substitution or pretended substitution to deceive opponents at or immediately before the snap or free kick.

2. Case Book 9.6.4 situation B spells it out in black and white. Not sure how there is any disagreement at this point.

3. NFHS "Football Points of Emphasis - 2016":

UNFAIR ACTS
"...The NFHS Football Rules Book specifically prohibits unfair acts. Rule 9-10 lists some examples of unfair acts, including hiding the football under a jersey or using an illegal kicking tee. Other unfair acts are prohibited by the spirit and intent of other rules, include, but are not limited to, the following:
1. Uniforms which do not conform to specified standards or which have a foreign substance on them;
2. Use of disconcerting acts or words prior to the snap in an attempt to interfere with the offensive team’s signals or movements; and
3. “Hide-Out” plays, including those that use a substitution or pretended substitution in order to deceive opponents at or immediately before the snap or free kick.

Of course, it is impossible to list every unfair act that could take place. Deliberately violating the rules in the hope or expectation of not being detected is deplorable and indefensible, and should be penalized."

https://www.mhsaa.com/portals/0/documents/FB/rules.pdf