Use of the coat of arms?

[wildvioletheart]

I want to give my boyfriend a custom engraved flask and I was originally going to put his name and then the Alpha Sigma Phi coat of arms, but then I remembered Greek organizations, especially Alpha Sig, have strict rules about what they can or cannot put their letters, crest, etc. on.... I go to a small school so they take this probably more seriously than bigger schools and my boyfriend is particular about these things. I can't ask him because I want to surprise him.

Here is my rough draft design


Do any Alpha Sigma Phi's know if this is ok or forbidden?
I want to be absolutely positive I'm not committing some type of taboo before I order it!!

Thanks!