article_snippet: The move was necessary after a decision by the Court of Appeal on a challenge to the Misuse of Drugs Act 1977.
article_snippet: The case dealt with the powers of the Government to control substances harmful to human health.
article_snippet: Court of Appeal unanimously said a regulation making the possession of methylethcathinone - also known as 4-mec or snow blow - illegal was invalid.
article_snippet: Because of the way the laws are drawn up, the ruling had the knock-on effect of temporarily legalising the possession of some other drugs.
article_snippet: the Government said the outcome of The case did not affect existing laws on heroin, cocaine or cannabis.
article_snippet: While The case dealt with the legality of possession of named substances, their sale and supply remains an offence. '
highlights_snippet: Result caused by Court of Appeal overturning methylethcathinone ban .
  
highlights_snippet: Change has had no effect on existing laws on heroin, cocaine or cannabis .