The department may enter into any contracts necessary to the execution of the powers granted it by this chapter. All contracts made by the department, either as the agent of the state or as the agent of any municipality, shall be made pursuant to the laws of the state governing the making of like contracts. Where the planning, acquisition, construction, improvement, maintenance, or operation of any airport or air navigation facility is financed wholly or partially with federal moneys, the department as agent of the state or of any municipality, 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.