Two nights ago, I showed up early for our team's CYO tournament game. At the game in progress upon my arrival, I noticed the officials were wearing gray shirts for what looked like a 6th or 7th grade boys game.
It made me wonder if grey shirts really are permissible on this level
(CYO in my area being divided in varsity for grades 7 and 8 and JV for grades 5 and 6).