Any member who elects, pursuant to Section 31700 and 31832, to leave his accumulated contributions on deposit may be retired for disability, regardless of age or length of service, and receive a disability retirement allowance under this article based on the service credited to him at the time of retirement during any period thereafter in which he receives a disability retirement allowance under the Public Employees’ Retirement System or a retirement system established under this chapter in another county, subject to the following conditions:
(1)
That such allowance shall not be paid if the period intervening between the last service credited under this system and his becoming a member in such other system exceeds 90 days.
(2)
That if the member is retiring for non-service-connected disability, and, if a safety member has not attained age 55, or if a nonsafety member has not attained age 65, his retirement allowance shall be as calculated pursuant to Section 31838.
(3)
That such allowance shall be an annuity which is the actuarial equivalent of the member’s accumulated contributions when retirement under the other system is for disability arising out of and in the course of employment subject to such other system.