[FlasherZ]

I'm going to assume you are talking NFHS, standard, non-televised game.

Resumption-of-play rule specifically says it's not for use if either team is not on the court to begin the second half.

According to the rules, provided the proper warnings were given by the officials per 2-12-1, rule 10-2-1-a says it's a team technical if more than one minute goes by without the team being ready to start. Then, if the team is ordered to come out but refuses, you can use rule 5-4-1 to cause a game forfeit.

If it went 2 1/2 minutes past the end of intermission, I would *hope* that one of the officials would have gone to Team A's locker room at some prior point to ensure they know the clock situation, then a judgment call could be made as to whether it's egregious enough to warrant that team technical (or if it's because the official didn't do his job to notify the team).

Some officials might expect them to be aware of the time and would be quick to pull the trigger on the technical. Practically speaking for me, it's "Team A! Ready to start, let's go!" and see how they respond.