(1) This section applies to a person who is deemed to have been re - appointed to the Commonwealth Teaching Service under section 43W.
(2) There shall be ascertained, in the manner determined, in writing, by the Secretary, with the approval of the Public Service Board, the period (if any) of leave of absence for recreation and the periods (if any) of leave of absence on account of illness that are applicable to a person to whom this section applies on his re - appointment and, if such a period is applicable to him, he shall be credited with that period.