143.18. The second paragraph of section 6 and sections 14, 16 and 42 apply for each year and part of a year of service credited by reason of sections 143.16 and 143.17 that were subsequent to the year during which the employee or person qualified for membership in this plan and during which the employee or person held more than one pensionable employment simultaneously under this plan after the date of qualification for membership but before 1 January 2005.