New members and letters

[TPA85]

I really hope that I'm not stepping over the line by asking this, but I have a question about whether or not new members are allowed to wear Chi O letters.

My little cousin just joined Chi O and she told me that her new member educator stated that her pledge class "isn't allowed to wear letters" until they are initiated.
I was under the (potentially misguided) impression that all NPC new members were allowed to wear their sorority's letters... Is this not true??
We didn't have XO on my alma mater's campus so I don't know any members and I don't know anyone to ask personally.

Again, sorry if this is one of those "no fly zone" kind of questions, I was just confused about her telling me that and when I Googled it I couldn't find anything about new members and letters.

Thanks in advance, and feel free to PM responses if you prefer.