Untucked jersey technical!

[Nevadaref]

Coach,
As your research has revealed the correct sanction is to direct the player to leave the game and require a substitute, if the shirt is out. If the player is to attempt FTs, then the procedure outlined in the first Case Book play listed below would be followed.
The only way that I could envision an official assessing a technical foul for this would be if the official directed the player to tuck in his jersey and then the player defiantly pulled it out again. That could be construed as unsporting conduct, but it is a stretch. Also pulling out the shirt in an act of disrespect or disgust for a call made by an official would be worthy of a T as noted in the final Case Book play below.


DIRECTED TO LEAVE GAME – UNIFORM
3.3.5 SITUATION: B1 fouls A1. Just before A1 goes to the line for a one-andone,
the official observes: (a) A1 pull the shirt out of his/her pants; or (b) A1’s
pants being worn below the hips. RULING: In both (a) and (b), A1 will be directed
to put the shirt in the pants or pull up the pants, and must leave the game
immediately following his/her last free throw(s). The lane is cleared for the free
throw and Team B is awarded the ball for a throw-in, whether or not the last free
throw is successful.

10.4.1 SITUATION D: A1 commits his/her fifth foul and is disqualified. On the
way to the team bench, A1 removes his/her shirt or pulls it over their face: (a)
before the coach is notified; or (b) after the coach is notified. RULING: In (a) and
(b), a technical foul is charged to A1. In (b), an indirect technical foul is also
charged to the head as A1 is considered to be bench personnel. (10-4-1h)