A service retirement allowance under this part shall become effective upon any date designated by the member, provided all of the following conditions are met: (a) An application for service retirement allowance is filed on a form provided by the system, which is executed no earlier than six months before the effective date of retirement allowance. (b) The effective date is later than the last day of creditable service for which compensation is payable to the member. (c) The effective date is no earlier than the first day of the month in which the application is received at the system`s headquarters office, as established pursuant to Section 22375. (d) The effective date is no earlier than one year following the date on which the retirement allowance was terminated under Section 24208, or subdivision (a) of Section 24117. (e) The effective date is no earlier than the date upon and continuously after which the member is determined to the satisfaction of the board to have been mentally incompetent. (f) A member who files an application for service retirement may change or cancel his or her retirement application, as long as the form provided by the system is received in the system`s headquarters office, established pursuant to Section 22375, no later than the last day of the month in which the retirement date is effective.