In addition to the limitations set forth in Section 607, permits or licenses shall be subject to the following:
(a) Reservation for Departmental Purposes. Every assignment of space shall reserve to the department the right to use the space or facility for Departmental Purposes when the space is not required for the use of the grantee.
(b) Revocation Upon Notice. Every assignment of space shall be revocable without compensation to the grantee, upon notice.
(c) Common Use Requirement. Every assignment of space shall include a provision that use of airport facilities shall be in common with others, but only to the extent necessary to exercise the rights granted by the permit or license.