NFHS 3 Min. warmup

[DJ_NV]

The only reference I can find to the 'mandatory 3-min. warmup' is on the Table 3-1 on p. 37.

What is the proper procedure for this, taking into account factors outside the rulebook like common sense and legal liability on the part of the officials?

If I take it straight from the book, the 3 minutes starts immediately following intermission. So should the clock operator be directed to start the 3 minutes right after the official halftime gets to 0:00 even though one or both teams are not on the field? In other words, are officials covered because we allowed the time or do we need to wait for both teams to be on the field but possibly penalize the HC per 9-8-1-g as it's his responsibility for the team to be on the field for the mandatory warmup?

thanks

DJ