substitution vs participation

[hawkishowl20]

Originally Posted by JRutledge

Can you reference the exact language where it says "3 seconds" constitutes "immediately?" Keep looking, because you will not find it.

BTW, there is no 3-7 Comment. There is a 3.7 Comment.

Peace

OK, the following quotation is the reference where the exact language says "3 seconds" constitutes "immediately.”
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Case Book: *3-7 COMMENT; *3.7.3 A & B; *9.6 COMMENT; *9.6.1D; *9.6.4C
Illegal substitution is a dead ball five yard foul and will be called if there are more than 11 defensive players on the field and the "extra players" (substitutes) are not making a bona fide attempt to get off the field.

Illegal Participation is a live ball 15 yard foul and occurs once the ball is snapped with more than 11 players on a side. The reason officials try to enforce the illegal substitution is because it is a 5 yard foul rather than the 15 yard foul.

The defense do not have "until the ball is snapped" to complete their substitution, a substitute must replace a player immediately. Immediately has been defined as "within 3 seconds". Hence the substitute must replace the player within 3 seconds of going to the defensive huddle or to the vicinity of the replaced player
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BTW it says Case Book: *3-7 COMMENT; [U]*3.7.3[/U] A & B; *9.6 COMMENT; *9.6.1D; *9.6.4C