The 'agreement' group
These nouns refer to the fact that someone is allowed, asked, or told to do something.
Entry is by invitation only.
Copies are available by request from the address or phone number on the front of your bill.
Courtesy, order, and permission are followed by a prepositional phrase beginning with of.
Cafes and restaurants are all closed by order of the authorities.
Agreement is sometimes followed by a prepositional phrase beginning with with.
by agreement (with ...) by consent by contract by courtesy of ... by invitation by order of ... by permission of ... by request by ticket
By agreement with Parliament, the income from the Crown Estate goes straight to the Treasury.