(a) Any member under age 60 having at least 9 years of credited service who becomes totally and permanently disabled for service, either mentally or physically, from any cause other than duty disability shall be entitled to a nonduty disability annuity.
(b) Such annuity shall begin to accrue upon termination of payments to the employee by the Government of amounts representing full compensation, part compensation or any other form of compensation; Provided, That if written application for such annuity is not filed with the System within 60 days of the date of termination of such compensation payments, the annuity shall begin to accrue as of the day 60 days prior to the receipt of such application.
(c) A member shall be considered totally and permanently disabled only after the System has received (1) written certification by at least two licensed and practicing physicians, selected by the Board, that the member is totally and likely to be permanently disabled for further performance of the duties of any assigned position in the service of the employer, and (2) written certification from the employer that the member has been separated from the service of the employer because of a total and permanent disability of such nature as to reasonably prevent further service for the employer, and as a consequence is not entitled to compensation from the employer.
(d) The amount of disability retirement annuity shall be equal to 2 percent of average compensation for each year of credited service at date of disability, subject to a minimum of 20 percent of average compensation and a maximum of 60 percent of average compensation in an amount not to exceed $65,000 per annum, exclusive of any cost of living annuity, bonuses or adjustments. Any payments by the employer representing salary or part salary shall be applied to reduce the amount of the annuity payable to the member.
(e) The recipient of a non-duty disability annuity shall provide earnings and medical information as requested by the System to verify disability claims. If the recipient fails to provide requested information, the non-duty disability annuity must be discontinued until the time as the requested information is provided. When the requested information is provided, the non-duty disability annuity resumes.