Sisters wearing letters during recruitment

[celebcj]

So I now attend graduate school at Ole Miss, and I find it so interesting that during the day, active sisters are allowed to wear letters!

I just imagine some PNM cornering an active in the grocery store, who she spotted wearing letters, and trying to obtain invites, etc.

I thought it was a NPC rule, as my undergrad chapter would get a HUGE fine if one of us wore our letters at all during recruitment week.

Is this not the case?