5. Any request for exemption for the brother or sister of a child having serious learning disabilities who has been exempted from the application of the first paragraph of section 72 of the Charter shall be accompanied by a copy of the child’s certificate of eligibility and the birth certificate, stating the parents’ names, of the brother or sister for whom the request is made. Failing such a birth certificate, any other official document issued by a competent authority and establishing the date of birth, sex and filiation of the child shall be produced.