(b) Authority to carry out a military construction project or a military family housing project may be exercised on land not owned by the United States
(1) before title to the land on which the project is to be carried out is approved under section
3111 of title
40; and
(2) even though the land will be held in other than a fee simple interest in a case in which the Secretary of the military department concerned determines that the interest to be acquired in the land is sufficient for the purposes of the project.
