Normaly its a squwak code on the ground and then a clearance after take off as you are departing the GAAP zone for a VFR departure, you only get an actual clearance when departing in IMC from a GAAP. Is this right?
I dont think you need to actualy request ''Clearance'' or ''code'' it in your radio call as believe ATC know what you need from your flight plan.
Im sure someone can confirm.....