All contracts for the acquisition, construction, enlargement, improvement, maintenance, equipment, or operation of airports or other air navigation facilities, made by any of the political subdivisions referred to in sections 2-05-06.1 and 2-05-06.2, by itself or through the agency of the aeronautics commission of the state, must be made pursuant to the laws of this state governing the making of like contracts; provided, however, that if such acquisition, construction, improvement, enlargement, maintenance, equipment, or operation is financed wholly or partly with federal moneys the municipality, or the aeronautics commission as its agent, may let contracts in the manner prescribed by the federal authorities, acting under the laws of the United States, and any rules or regulations made thereunder, notwithstanding any other state law to the contrary.