104.401.  Retirement requirements and procedure, annuity or deferred normal annuity, payment to commence when — temporary waiver of right to receive, effect, limitation. — 1.  Any member may retire with the annuity provided for in section 104.335, 104.370, 104.371, 104.374 or 104.400 upon the member's written application to the board designating the annuity starting date which shall be the first day of the month with respect to which an amount is paid as annuity; except that at the time of the annuity starting date, the member must have attained the normal retirement age or meet the eligibility requirements of subsection 2 of section 104.400 and must have sufficient years of creditable service.  The annuity starting date shall not be earlier than the first day of the second month following the month of the execution and filing of such application nor later than the first day of the fourth month following the month of the execution and filing of such application.  The annuity shall commence in the month of the annuity starting date specified by the member in such application.  The payment of the monthly service retirement annuity shall be made by the last day of each month, providing all documentation required pursuant to section 104.395 for the calculation and payment of the benefits is received by the board.  The member shall designate a beneficiary to receive any final monthly payment due after the death of the member if no survivor annuity is payable.

  2.  Nothing in sections 104.010 and 104.320 to 104.800 shall be construed as prohibiting a member from waiving the member's right to receive the member's monthly annuity for a period of time that the member chooses.  However, the waiver may not extend beyond the age permitted by Section 401(a)(9) of the Internal Revenue Code.  The waiver shall be final as to benefits waived.