The bill mandates that all fitness centers in Washington State must acquire and maintain at least one semiautomatic external defibrillator (AED) on their premises. It outlines specific requirements for fitness centers, including the instruction of personnel on the use and maintenance of the defibrillator, as well as notifying local emergency medical services about its location. Additionally, employees who have completed the required training are authorized to provide emergency care using the AED, and individuals using the device in an emergency situation are granted immunity from civil liability.

The bill defines a "fitness center" as any facility used for various physical activities that operates on a membership basis, while explicitly excluding public and private schools, certain nonprofit organizations, and private home-operated facilities that do not offer memberships. This legislation aims to enhance safety measures in fitness centers by ensuring the availability of life-saving equipment and trained personnel in case of cardiac emergencies.