Final answer:
The authority to grant additional rest/recovery time varies depending on the context, such as workplace or military environments. Usually, a supervisor or someone in a command position provides authorization, and the duration of rest is determined by necessity, legal standards, or organizational rules.
Step-by-step explanation:
The authority to grant additional rest or recovery time may vary based on context, such as workplace, military, sports, or medical rest periods. Typically, in a workplace setting, the authority to grant additional rest would generally come from an individual's supervisor and may be subject to labor laws and company policies. In sports, it may be a coach or sports physician, while in the military, it could be a commanding officer.
In terms of how long the additional rest or recovery time can be, this is typically determined based on the necessity for recovery, recommendations from health professionals, legal labor standards, or specific rules and regulations of the organization. Certain laws, such as those mandated by the Occupational Safety and Health Administration (OSHA) or under the Family and Medical Leave Act in the United States, might provide guidelines for rest periods in workplace environments. Recovery time lengths may consequently be standardized or made on a case-by-case basis.