Sec. Sec. 88-79
Service-connected disability retirement.
Notwithstanding any other law to the contrary, any condition of impairment of health caused by any disease of the heart, lungs, or respiratory system, resulting in permanent incapacity to a fire fighter, police officer, or sewer worker, shall be presumed to have been suffered in the actual performance of duty at some definite time and place through no wilful negligence on the fire fighter's, police officer's, or sewer worker's part, and as a result of the inherent occupational hazard of exposure to and inhalation of smoke, toxic gases, chemical fumes, and other toxic vapors, unless the contrary be shown by competent evidence; provided that such fire fighter, police officer, or sewer worker shall have passed a physical examination on entry into such service or subsequent to such entry, which examination failed to reveal any evidence of such condition.
In the case of fire fighters, police officers, and sewer workers, the effect of the inhalation of smoke, toxic gases, chemical fumes, and other toxic vapors on the heart, lungs, and respiratory system shall be construed as an injury received or disease contracted while in the performance of their duty and as the result of some occupational hazard for the purpose of determining occupational disability retirement under this section.