(a) Air Force - Civil Air Patrol Liaison Offices and land incidental thereto when required for use incidental to, in conjunction with, and in close proximity to airports, including aircraft and warning stations (if unimproved, land may be leased only on a fiscal year basis; for space, lease terms, including all options, limited to 5 years).

(b) Armories.

(c) Film library in the vicinity of Washington, DC.

(d) Mess halls.

(e) Ports of embarkation and debarkation.

(f) Post exchanges.

(g) Postal Concentration Center, Long Island City, NY.

(h) Recreation centers.

(i) Reserve training space.

(j) Service clubs.

(k) Testing laboratories (lease terms, including all options, limited to 5 years).