Any person who is receiving, or becomes eligible to receive, a pension, or other benefit, or any increase under Chapter 742 of the Revised Code, may, at any time, waive the person’s rights thereto, or to a portion thereof, by filing a written notice of waiver with the person from the Ohio police and fire pension fund. Such waiver shall remain in effect until the first day of the month following the person’s death, or the person’s filing of a written cancellation of such waiver with the board. Any amount so waived shall forever be forfeited.