Question about simultaneous Ts.

[Nevadaref]

Subs A6, A7, and B6 have all reported to the scorer and are waiting at the table to enter during the next dead ball opportunity.
One of the officials calls a foul and goes to report it. As he is reporting all three subs run out onto the floor to the FT lane and tell their teammates that they are replacing them.
If the officials were to penalize each of the offenders with a technical foul, I was wondering how it would be administered.

All of the Ts would have to be considered simultaneous, so does that mean that NO FTs are awarded or should it be done as in the fight situation where two of the Ts offset and the third T warrants FTs? It doesn't seem clear to me.