850. Service of documents.

850.     Service of documents.

Any document required or authorised1 to be served upon any authority, body or person in relation to the compulsory admission to hospital2, guardianship or community treatment orders3 may be served by delivering it to: (1) the authority, body or person upon whom it is to be served4; (2) any person authorised by that authority, body or person to receive it5; (3) by sending it pre-paid post6 addressed to the authority or body at their registered or principal office or the person upon whom it is to be served at that person's usual