If a teacher first joined the plan before July 1, 1982, and is married or has a minor child and wishes to make a spouse or minor child eligible for a spouse’s pension or a survivor’s allowance, the teacher may elect to make a supplemental contribution of an additional one percent of the teacher’s base salary within 90 days of the teacher’s entry into participation in the plan, or within 90 days of marriage, or within 90 days of the birth or adoption of a child dependent upon the teacher. Once an election is made under this section, supplemental contributions must be made whenever contributions are required under Alaska Stat. § 14.25.050 unless the teacher executes a written waiver with the administrator. The execution of a waiver relinquishes all rights and benefits previously accrued under Alaska Stat. § 14.25.162 and 14.25.164.