I don't have the authority to give you the green light. ✬

He is an authority on criminal law. ✬

He abuses his authority. ✬

I don't have the authority to give you permission. ✬

Tom abuses his authority, so no one likes him. ✬

Tom is an authority on the subject. ✬

Tom thinks that schools should teach children to obey authority. ✬

Tom has no authority. ✬

I don't have the authority to do that. ✬

They respect authority. ✬