Definicija: The basic rule is that an employee who is on standby duty must be present for a period of time specified by the employer at a location specified by the employer and must start work immediately when called upon to do so. Standby duty is working time.
Vir definicije: lexology.com https://www.lexology.com/library/detail.aspx?g=86e9e97e-bfb5-43f3-9c68-5060e86bdc96