((a)) Any construction, expansion, rehabilitation, or conversion under may be performed under the supervision of the Chief of Engineers of the Army or the head of such office or agency in the Department of the Navy as the Secretary of the Navy may designate.
((b)) The construction, expansion, rehabilitation, or conversion of facilities in a State under paragraph (2), (3), (4), (5), or (6) of shall be done according to the laws of that jurisdiction and under the supervision of its officials, subject to the inspection and approval of the Secretary of Defense.