Article 7(b), of the UCMJ - a person must have commited a crime or look like they will commit a crime. It can be convoluted thanks to "probable cause" and objective reasonableness).
It depends on who "you" is. Article 7 gives apprehension authority to military and naval law enforcement officials. Article 8 authorizes state/local police officers to apprehend deserters, only.
The US Constitution specifies that the President is the commander-in-chief of US military forces.
In a democracy authority comes from the people.
The Parliament does
Adjudication means to give power, right, or authority.
Rights
What government gives the supreme authority to the states
What government gives the supreme authority to the states
What government gives the supreme authority to the states
What government gives the supreme authority to the states
The King
Christians have whatever authority that God gives them. That may include the authority to control demons, cast them out, and silence them and lots more.