4.2. The annualized pensionable salary of a person who ceases to be a member of one of the plans referred to in paragraphs 1 to 5.1 and 9 of Schedule I after 31 December 2009 is, for the purposes of computing the person’s accrued pension, the salary that would have been determined for that person if the person had not availed himself or herself of the measures provided for in sections 2 to 4.