“Local safety member” also includes all employees of a public agency whose principal duties consist of rendering prehospital emergency medical care to ill or injured persons and who are employees designated as Emergency Medical Technician-I, Emergency Medical Technician-II, or Emergency Medical Technician-Paramedic, as defined by, respectively, Sections 1797.80, 1797.82, and 1797.84 of the Health and Safety Code.

This section shall not apply to any contracting agency nor to the employees of a contracting agency until the

agency elects to be subject to this section by amendment to its contract with the board made pursuant to Section 20474 or by express provision in its contract with the board.