(1) The employer must ensure that all employee alarm systems are maintained in operating condition except when undergoing repairs or maintenance.

(2) The employer must ensure that a test of the reliability and adequacy of nonsupervised employee alarm systems is made every two months. The employer must use a different actuation device in each test of a multiactuation device system so that no individual device is used for two consecutive tests.

(3) The employer must maintain or replace power supplies as often as necessary to ensure fully operational condition. The employer must provide back-up alarms, such as employee runners or telephones, when systems are out of service.

(4) The employer must ensure that supervised employee alarm circuitry is supervised and that it will provide positive notification to assigned personnel whenever a deficiency exists in the system. The employer must ensure that all supervised employee alarm systems are tested at least annually for reliability and adequacy.

(5) The employer must ensure that employee alarms are serviced, maintained, and tested by someone trained in the operation and functions necessary for reliable and safe operation of the system.