All special leaves must be issued in writing, must set a determinate period of duration, and must be signed by both the warden or superintendent and by the commissioner; this authority may not be delegated except as provided in Code Section 42-5-84. All such writings must be kept on file in the office of the commissioner.
(Ga. L. 1971, p. 342, § 2; Ga. L. 1972, p. 579, § 2.)