Cal. Lab. Code § 3212
In the case of members of a sheriff's office or the California Highway Patrol, district attorney's staff of inspectors and investigators or of police or fire departments of cities, counties, cities and counties, districts or other public or municipal corporations or political subdivisions, whether those members are volunteer, partly paid, or fully paid, and in the case of active firefighting members of the Department of Forestry and Fire Protection whose duties require firefighting or of any county forestry or firefighting department or unit, whether voluntary, fully paid, or partly paid, and in the case of members of the warden service of the Wildlife Protection Branch of the Department of Fish and Game whose principal duties consist of active law enforcement service, excepting those whose principal duties are clerical or otherwise do not clearly fall within the scope of active law enforcement service such as stenographers, telephone operators, and other officeworkers, the term "injury" as used in this act includes hernia when any part of the hernia develops or manifests itself during a period while the member is in the service in the office, staff, division, department, or unit, and in the case of members of fire departments, except those whose principal duties are clerical, such as stenographers, telephone operators, and other officeworkers, and in the case of county forestry or firefighting departments, except those whose principal duties are clerical, such as stenographers, telephone operators, and other officeworkers, and in the case of active firefighting members of the Department of Forestry and Fire Protection whose duties require firefighting, and in the case of members of the warden service of the Wildlife Protection Branch of the Department of Fish and Game whose principal duties consist of active law enforcement service, excepting those whose principal duties are clerical or otherwise do not clearly fall within the scope of active law enforcement service such as stenographers, telephone operators, and other officeworkers, the term "injury" includes pneumonia and heart trouble that develops or manifests itself during a period while the member is in the service of the office, staff, department, or unit. In the case of regular salaried county or city and county peace officers, the term "injury" also includes any hernia that manifests itself or develops during a period while the officer is in the service. The compensation that is awarded for the hernia, heart trouble, or pneumonia shall include full hospital, surgical, medical treatment, disability indemnity, and death benefits, as provided by the workers' compensation laws of this state.
The hernia, heart trouble, or pneumonia so developing or manifesting itself in those cases shall be presumed to arise out of and in the course of the employment. This presumption is disputable and may be controverted by other evidence, but unless so controverted, the appeals board is bound to find in accordance with it. The presumption shall be extended to a member following termination of service for a period of three calendar months for each full year of the requisite service, but not to exceed 60 months in any circumstance, commencing with the last date actually worked in the specified capacity.
The hernia, heart trouble, or pneumonia so developing or manifesting itself in those cases shall in no case be attributed to any disease existing prior to that development or manifestation.
Ca. Lab. Code § 3212