Any municipality or county owning lands on which no permanent building has been actually constructed, whether such lands constitute part of a park or site for some public structure, is authorized to convey the same to the Armory Commission of Alabama for use as a site for an armory for the Alabama National Guard or Naval Militia; provided, that such conveyance will not prevent the reasonable use of any such structure for the purpose for which it was constructed.
Ala. Code § 31-4-11 (1975)