I don't think you need to say POB either.
POB (if IFR other than RPT)]
So only if you're non RPT IFR. And I still can't see where it says you need to say the words 'requesting clearance'.
I honestly don't think its required as the only aircraft that are calling on SMC at a GAAP are the ones requesting a clearance. Otherwise why are you making this call?
Until someone can link me to a reg that specifies clearly that I have to say these words, the only reference I can give to a student such that they can look it up is that specifically mentioned in the AIP, which makes very specific reference to phraseology in the GAAP.