Appointment or designation letter
The Jewish source of authority is the TeNaKh.
Shinto has no absolute source of authority.
The people of the United States is the source of authority of the constitution.Your welcome :)
He is an actor!
The authority and power of goberment comes from God
Not at present.
If there is a preposition following authority, it is often "of" indicating the source of authority. The prepositions "in" or "for" would indicate the scope of authority.
it is boring
The people
No.
Elections are the source of government authority. By voting, the public implicitly agrees to be governed by whoever wins the election.