(a) A trusty may not be permitted to leave the location where the institutional division has assigned the trusty unless the trusty is on division business.
(b) A trusty may not be at large or off institutional division property after 9 p.m. unless accompanied by a guard or other employee of the division or a member of the board.
(c) Subsection (b) does not apply to a trusty who operates pumps or other necessary machinery at night on an institutional division farm.
(d) Employees of the institutional division who are in charge of trusties shall ensure that trusties required to be inside division buildings not later than 9 p.m. are inside by that time.