when does a conference begin ?

[Az.Ump]

NCAA

Conferences
SECTION 11. a. Charged defensive conference.
1. There may be only one charged defensive conference per inning.
Exception: On each pitching change when the pitcher has not yet
pitched in the inning, one additional conference is permitted.
Note: Conferences are not cumulative.
The plate umpire shall notify the head coach when a defensive conference
has been charged and record the inning on the team's lineup card. A charged
defensive conference begins when the team representative(s) delays the
game or suspends play to deliver a message to the defense, and ends when
the team representative(s) returns to the dugout.
EFFECT—The umpire shall not permit more than one defensive
conference per inning. The team representative(s), who holds
or attempts to hold another charged conference, shall be
immediately ejected.
Exception: The following are not charged defensive conferences:
1. Giving instructions from the dugout area to the defense without
requesting a suspension of play.
2. Requesting a suspension of play in order:

a. To remove the pitcher from the pitching position (provided the
umpire is informed of the change before the representative steps
over the foul line) or to make a defensive substitution.
b. To confer with the defense during a charged offensive conference
or during a suspension of play.
Note: The defensive team may be charged with a defensive conference
if not ready to play after the umpire’s declaration.
c. To attend to an obviously incapacitated player.
d. To attend to a potentially sick or injured player. The process must
be supervised by an umpire.
e. For a defensive player to make an equipment change.

Paul