87.83. Where the disability persists after 104 weeks, a senior administrator shall benefit from the mandatory basic long-term salary insurance plan, his participation in the plan ends and the following provisions apply:(1) where the senior administrator has already used his period of leave, he is not required to reimburse the salary he was overpaid; one year of service for retirement plan purposes shall be recognized for each year of participation in the plan;
(2) where the senior administrator has not used his period of leave, he shall receive the portion of salary he has not received for the period of work elapsed, but without interest. The provisions of paragraph 4 of section 87.88 shall apply.