Well, after giving it some more thought.. unless someone actually knows the creator's intentions (whether or not he intended it to be a secret for ct's or t's) I guess we'd have to assume that it is a T-Secret and swappable if you get it, according to the definition of a T-Secret and guard rules. Definitions:
T-Secret – Getting something which is hidden or a place where a T can hide themselves from the CT’s. A prisoner is automatically KOS for doing this but the warden can pardon T-Secrets for ST’s or during a freeday.
As a guard, you must not pick up any T weapon caches/secrets, even if it was dropped by a T (except if it’s interfering with gameplay or on a freeday).
It's a bummer, but unless I get yes or no confirmation from an admin or the creator, I'll just have to restrain myself. This also means on wardays too. :/