17. (1) A detainee may make application in writing to the Director requesting the Director to make an order varying—
(a) the time at which he or she is required to report at a detention centre or place of work during the whole or part of the detainee's sentence; and
(b) the time at which he or she may leave a detention centre or place of work during the whole or part of the detainee's sentence.
(2) Subject to subsection (3), where a detainee makes application under subsection (1), the Director may—
(a) grant the application and order that the times in respect of which the application is made be varied as requested in the application; or
(b) refuse to grant the application.
(3) The Director shall refuse to grant an application which has the effect of increasing or reducing the number of consecutive hours of periodic detention.