[BillyMac]

2-7-1: The officials shall conduct the game in accordance with the rules. This
includes: Notifying the captains when play is about to begin at the start of
the game.

3-1-1: Each team consists of five players, one of whom is the captain.

3-1-2: The captain is the representative of his/her team and may
address an official on matters of interpretation or to obtain essential
information, if it is done in a courteous manner. Any player may address an
official to request a time-out or permission to leave the court.

3-3-E: A captain may request a defensive match-up if three or more
substitutes from the same team enter during an opportunity to
substitute.

8-2: The free throw(s) awarded because of a personal foul shall be attempted
by the offended player. If such player must withdraw because of an injury
or disqualification, his/her substitute shall attempt the throw(s) unless no
substitute is available, in which case any teammate may attempt the
throw(s) as selected by the team captain or head coach.

8-3: The free throws awarded because of a technical foul may be attempted by
any player of the offended team, including an eligible substitute or
designated starter. The coach or captain shall designate the free thrower(s).

For us IAABO guys, IAABO made it a lot easier to avoid the, "Who's the speaking captain? What's your number (if hidden by a warmup jersey)? Are you starting?", in the pregame coaches/captains conference with a mechanics change last season:

2018-2019 IAABO Significant Manual Revisions:
The tossing official on the jump ball no longer checks for readiness with the captains.

I haven't had a request for a defensive match-up in, literally, decades, and most of the guys here in my little corner of Connecticut will answer questions from any player if done in a courteous manner.