Billy McKee

Misuse of Drugs Act 1975 section 8 (2)(c) "Any person for whom a controlled drug is supplied by a medical practitioner or dentist, or prescribed by a medical practitioner or dentist and lawfully supplied, may administer that drug to himself in accordance with the advice of the medical practitioner or dentist who supplied or prescribed it."

http://www.bushlawyer.co.nz/docs/CA7812012.pdf