Any commissioned officer assigned to special duty by the governor or under the governor's authority must be paid duty pay for the time actually employed, and the officer's necessary traveling expenses and subsistence when such payment is authorized by the governor. Judge advocates must be paid such compensation as shall be approved by the governor for services in bringing any suits provided for in this title, and in actions or proceedings by habeas corpus, certiorari, or otherwise. All staff officers must be paid duty pay for special service ordered by competent authority with the approval of the governor. Enlisted persons on duty under orders of the governor, but not at the time serving with troops, shall receive the same rate of pay as is provided for the national guard when called into active service by the governor and their actual traveling expenses and subsistence.