Shooting foul to end the half

[Refhoop]

Originally Posted by Nevadaref

Straight from the NFHS Case Book:
UNAUTHORIZED LEAVING OF THE BENCH AREA/PLAYING COURT
10.5.5 SITUATION A: Airborne shooter A1 is fouled by B1 after the ball is
released on the try. Playing time for the second quarter expires while the unsuccessful
try is in flight. Since no players are required to line up for the free throws,
Team B’s head coach takes the team to the locker room to begin the intermission.
RULING: Team B’s head coach is assessed a direct technical foul for permitting
team members to leave the bench/court for an unauthorized reason. Even though
no time remains on the game clock, the quarter doesn’t end until A1’s free throws
are completed; therefore, the technical foul is part of the second quarter. A1 will
attempt the two shooting-foul free throws followed by any Team A member
attempting the two free throws for the technical foul. The Team B head coach has
lost coaching-box privileges for the remainder of the game. The third quarter will
begin with the alternating-possession procedure. (5-6-2 Exception 3)

Here's my question: Do the starters need to remain on the floor (30 second time out-like) while the free throws are being shot or can all the players sit on the bench, get a drink of water etc... provided they remain in the court area?