Remain on Floor During 30 sec. Time-out

[tschriver]

Must players remain on court during 30 second time-out?
Can anyone identify where this is addressed in the NFHS rule book?

The book is clear for 1 minute time-outs (Rule 5, Section 12, Art. 5) but I'll be damned if I can find the ruling for 30 second.

Thanks in advance for your comments.