80. For the purposes of the definition of “child” in section 1, “attended a school or university on a full-time basis” means attended a school, college, university or any other educational institution that provides training or teaching of an educational, specialized, vocational or technical nature. A child is deemed to attend or to have attended a school or university on a full-time basis without interruption:(1) during a school vacation:(a) where, immediately after that vacation, he begins or continues to attend a school or university on a full-time basis during the following school year;
(b) where the child is unable to comply with subparagraph a due to illness or for any other good reason, if he begins or continues to attend a school or university on a full-time basis at any time during the school year beginning immediately after the end of the school vacation;
(c) where it has been established that the child is unable to comply with subparagraph b, if he begins or continues to attend a school or university on a full-time basis during the school year following the school year referred to in subaragraph a;
(2) during an absence that occurred during a school year due to illness or for any other good reason where, immediately after such absence, he begins or continues to attend a school or university on a full-time basis during the school year or, where it is impossible for him to do so, if he begins or continues to attend a school or university on a full-time basis during the following school year.