(1) The department may make available its engineering and other technical services, with or without charge, to the state, a county, municipality, or airport authority or person desiring them in connection with the planning, acquisition, construction, improvement, maintenance, or operation of airports or air navigation facilities.

(2) (a) The department may render financial assistance by grant, loan, or both, to any county, municipality, or airport authority, in the planning, acquisition, construction, improvement, maintenance, or operation of an airport owned or controlled, or to be owned or controlled by the county, municipality, or airport authority, out of appropriations made by the Legislature for these purposes. (b) Financial assistance may be furnished in connection with federal or other financial aid for the same purposes.

(a) The department may render financial assistance by grant, loan, or both, to any county, municipality, or airport authority, in the planning, acquisition, construction, improvement, maintenance, or operation of an airport owned or controlled, or to be owned or controlled by the county, municipality, or airport authority, out of appropriations made by the Legislature for these purposes.

(b) Financial assistance may be furnished in connection with federal or other financial aid for the same purposes.

(3) (a) The department may use the facilities and services of other state agencies and of the counties and municipalities to the utmost extent possible. (b) The state agencies, counties, and municipalities shall make available their facilities and services.

(a) The department may use the facilities and services of other state agencies and of the counties and municipalities to the utmost extent possible.

(b) The state agencies, counties, and municipalities shall make available their facilities and services.

(4) All powers granted to any county, municipality, or airport authority by this chapter may be exercised jointly with any county, municipality, or airport authority, and jointly with any state agency or the United States if the laws of the other state or of the United States permit the joint exercise.