If a disability retirant who has not attained his or her voluntary retirement age is or becomes engaged in a gainful occupation, business or employment, the amount of his or her disability retirement allowance shall not exceed the difference between his or her final salary and the sum of his or her earnings or other remuneration from the occupation, business or employment. If his or her earnings are later changed his or her disability retirement allowance shall be correspondingly adjusted.
(1957 Rev. Ords., § 2.525; 1992 Code, § 35-37)