297.18 DISABILITY PENSION.
   (a)   Upon retirement on account of disability, as provided in Section 297.17, a member shall receive a disability pension in accordance with Section 297.13, notwithstanding that he or she might not have attained sixty years of age. In no case shall his or her disability pension payable to his or her attainment of sixty-five years of age be less than twenty percent of his or her final average salary. Upon his or her retirement, he or she may elect an option provided for in Section 297.16.
   (b)   Upon termination of the statutory period for payment of worker's compensation, if he or she was in receipt of worker's compensation on account of his or her City employment, a disability retirant shall be given service credit for such statutory period, and his or her disability pension provided for in subsection (a) hereof shall be adjusted to include such additional service credit. However, in no case shall such additional service credit include any period beyond the retirant's attainment of sixty-five years of age.
(1974 Code § 1.223)