to officially empower and authorize (someone) to act as a substitute in one's role or office
To act as a substitute for a person in their role or office
To officially empower, authorize, pronounce, and establish (someone) to be a deputy.
To give permission, power, or the legal right to do something.
To give someone more confidence and/or strength to do something, often by enabling them to increase their control over their own life or situation.