Substitutes - When can they enter?

[BillyMac]

Originally Posted by BktBallRef

A6 can legally enter when Team A returns to the floor.

3-3-1: A substitute who desires to enter shall report to the scorer, giving
his/her number.
a. Between quarters, at halftime and during a time-out, the substitute must
report or be in position to report to the scorer, prior to the warning signal
which is sounded 15 seconds before the end of the intermission or the
time-out.
c. During multiple free throws resulting from personal fouls, substitutions
may be made only before the final attempt in the sequence and after the
final attempt has been converted.

Common sense tells me BktBallRef is correct. The rules also tell me BktBallRef is correct if we assume that Article A trumps Article C.