5. For the purposes of section 8 of the Act, an amendment to a plan may become effective before the date on which it is registered with Retraite Québec where(1) the amendment is made for the purpose of complying with a legal requirement. In such case, it must have effect on the date provided for by law;
(2) the purpose of the amendment is to reflect a change in the name of the administrator. In such case, it must have effect on the date on which the change of name occurs;
(3) the amendment is to the advantage of the plan members. In such case, it must have effect on the date determined by the administrator.