(1) no railway servant shall, without the permission of his superior, fail to report for duty, or absent himself while on duty or alter his appointed hours of attendance or exchange duty with any other railway servant or leave his charge of duty unless properly relieved.
(2) if any railway servant while on duty desires to absent himself from duty, he shall immediately report the matter to his supervisor or in charge and shall not leave his duty until a competent railway servant has been placed in charge thereof.
(3) if any railway servant is unable to attend his appointed roaster duty, he shall inform his supervisor or in charge well in advance so that a competent staff can be arranged to work in his place.