35.1.4. For the purposes of sections 33.3, 38 and the sections that refer to section 38, a contributory period is, for each year, the number of contributory days in the period during which the teacher participated in the plan in a year or in the period during which days and parts of a day were otherwise credited to the teacher with contributions, except the days and parts of a day determined by regulation, over the number of contributory days in the year concerned, that is, 200 or 260 depending on the basis of remuneration for the employment. The contributory period of a new teacher for the year during which the teacher becomes a member of the plan begins on the first day in respect of which the teacher contributed or was exempt from contributions and the last period ends on the last day credited in the year during which the teacher ceases to participate in the plan.