These Regulations amend the Misuse of Drugs Regulations 2001 (S.I. 2001/3998) (“the 2001 Regulations”) to place nitrous oxide, and preparations or products containing nitrous oxide (hereafter referred to as “nitrous oxide”), in Schedule 5 to the 2001 Regulations and to make provision for lawful access to the substance for legitimate purposes, including medical use.
Source: HMSO.