When the House Boy is changing primary clothing (shirts, pants, shorts, or sweats) at any Locker Or Changing Room (including beach, gymnasium, or private facilities) he must remove all worn clothing until he is completely naked before dressing again in the desired new clothing, except that he may optionally change clothes without removal of footwear for his health and safety.

long text

Rule 293A-M — Locker And Changing Rooms (Dressing)
Classified: XI - Traveling Away From Home