Rule 4, Section 5, Article 3

A single charged time-out shall not exceed one minute. The referee shall notify the teams within five seconds after the time-out expires and shall mark the ball ready for play.  Charged time-outs shall be reduced in length only if both teams are ready to play prior to the ready-for-play by the referee.

Rule 1, Section 6, Article 1

Electronic communication devices including but not limited to audio recorder, Local Area Network (LAN) phones and/or headsets, mobile phones, still photograph(s), film, analog or digital video(s) and/or Internet depictions, shall not be used to communicate with a player except during an outside 9-yard mark conference (7-yard marks in nine-, eight- and six-player competition).

NOTE: Each state association may authorize the use of a drum by a team composed of deaf or partially deaf players, in order to establish a rhythmic cadence following the ready-for-play.

Rule 8, Section 2, Article 5

If after a down in which a touchdown is scored, and prior to the initial ready-for-play signal for the try, either team commits any foul for which the basic spot is the succeeding spot, the offended team may accept the penalty and choose enforcement of the penalty:

a. On the try, or

b. On the subsequent kickoff.