whowhenwhy - not sure if you are saying this as a military ATCO. All aircraft, not just mil, can cross at the base Flight Level. There are only 3 types of Radar Service and you cannot provide RAS or RIS in controlled airspace so I go back to -
If you are allowed to operate in the airspace then you provide RCS. Separation may well be reduced as it can easily be on the edge of CAS when you don't have 5 or sometimes even 3 miles lateral against traffic outside. If you and/or the pilot are unhappy about giving traffic information only then you climb to at least 1,000ft inside.
If you are not allowed to provide a service inside that CAS then you terminate the service until clear of the airway.
zkdli - if the rules say the pilot does not need a radar service as in Class D and e airspace then you don't
need give one. However if you do provide a radar service inside CAS it can
only be RCS.
