The state administrative board is hereby authorized and empowered to lease to any state public building corporation, real property owned by the state of Michigan, acquired for the purpose of site or sites for public buildings, and to lease from any said public building corporation in the name of the state space in a building or buildings constructed for its use on such land. Each such lease shall be subject to the approval of the attorney general of the state. No such lease shall become effective until approved by the legislature by concurrent resolution.