83. Where a child ceases to be a child defined in section 1 while absent:(a) either during a school year for health reasons or for any other reasonable reason;
(b) or during school vacation;
that child is, notwithstanding section 80, deemed to have attended a school or university on a full-time basis without significant interruption until he ceases to be a child if, immediately after such absence,
(3) in the case of an absence referred to in paragraph 1, he begins or continues to attend a school or university on a full-time basis during that same school year or, where he is unable to do so, he begins or continues full-time attendance during the following school year;
(4) in the case of an absence referred to in paragraph 2, he begins or continues to attend a school or university on a full-time basis during the following school year.