If the Internal Revenue Service determines that any provision of Chapter 3 (commencing with Section 31450) of this part or this chapter cannot be given effect without placing a retirement system administered under this chapter or Chapter 3 (commencing with Section 31450) of this part out of conformity with Section 415 of the Internal Revenue Code, that provision, only to the extent that it causes that nonconformity and only with respect to the affected parties shall become inoperative with respect to the payment of benefits pursuant to Chapter 3 (commencing with Section 31450) of this part, as of the effective date of the determination. The retirement board shall notify the Secretary of State of inoperation under this section.