Yes it has. You need a FP for flight in/through/into/out of CAS. In the same situation, you need to talk to a controller. Make sense ?
To quote from the Spanish AIP:
Whenever flying within a portion of airspace where flight plan submission is required, a VFR flight shall maintain continuous listening on the appropriate radio frequency of the air traffic services. Position reports must be made in accordance with the controlled flight procedures.
A quick glance at a chart will tell you that any halfway serious touring in Spain is mostly done in one form of CAS or another. In reality, you therefore maintain two-way comms all the time. As an aside, Spain has quite a few
very remote areas, where it's not such a bad idea that ATC have at least a rough idea what you are up to. That said, in vast tracts of southern Spain, you won't be able to talk to them unless climbing quite a bit.
PS:PM sent