respect of each child placed by it in a foster home, maintain a foster child case record in the form set out in Form 4 in the Schedule. (4) The district probation and social welfare office shall also keep with the foster child case record the following— (a) a copy of the application form completed by the foster parent and a copy of the undertaking required by rule 9 of these Rules; and (b) reports made under rule 12 of these Rules. (5) A register prescribed by subrule (1) of this rule and a foster child case record made under subrule (3) of this rule may be inspected at any reasonable time by the commissioner or by any public officer authorised by him or her. (6) Every foster child case record made under this rule shall be preserved for at least five years after the child to whom it relates has attained the age of eighteen years or has died, or has returned to the care of his or her parents. (7) Every district probation and social welfare office shall report to the commissioner within one month after each fostering effected by it, the fact of the fostering and stating the information in Form 3 specified in the Schedule to these Rules. (8) A district probation and social welfare office shall also notify the commissioner within twenty-one days after its occurrence, of any change in the information referred to in subrule (7) of this rule. _____