NFL- bottom of the number is 12 yards off the sideline
NCAA- top of the number is 9 yards off the sideline
b. Nine-Yard Marks.
1. Each Team A substitute must have been between the nine-yard marks.
Team A players who participated in the previous down must have been
between the nine-yard marks after the previous down and before the next
snap (A.R. 3-3-4-I).
2. All Team A players must have been between the nine-yard marks after a
charged team timeout, an injury timeout, a media timeout or the end of
a period.
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