(a) Except as provided in subsection (e) or (f) or as otherwise authorized or provided by statute, no claim for expenses for any trip made beyond the borders of the state by any appointive state officer or employee shall be paid by the state unless the trip has been approved as provided by this section.

(b) Except as otherwise prescribed by a majority of the justices of the supreme court, authority to grant written approval for any such trip by an officer or employee of the judicial branch, or any agency thereof, is vested in the judicial administrator or the judicial administrator’s designee.

(c) Except as otherwise authorized or provided by statute, authority to grant approval for any such trip by a legislator or an officer or employee of an agency of the legislative branch is vested with the legislative coordinating council or an individual authorized by the legislative coordinating council to grant written approval in the case of any such trip by an officer or employee of an agency of the legislative branch.

(d) Except as otherwise prescribed by the officer, board or commission that appointed an agency head, authority to grant written approval for any such trip by an officer or employee of the executive branch is vested in such officer’s or employee’s agency head or the agency head’s designee.

(e) In cases involving such a trip by an agency head or by appointive members of a board, commission or similar body that appoints an agency head, no approval shall be required unless the appointing authority of the agency head or the members of the board, commission or similar body, as the case may be, requires such approval by the appointing authority.

(f) Such approval shall not be required for the payment of any claim for expenses 50% or more of which are paid from moneys received from federal agencies or other external sources.

(g) As used in this section, “agency head” means the chief administrative officer of a state agency or state institution.