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AUCKLAND, NEW ZEALAND - MAY 07: A collection of synthetic cannabis products that were available from Treasure Box in Onehunga, Auckland on May 7, 2014 in Auckland, New Zealand. The New Zealand Parliament has outlawed synthetic cannabis or "legal high" drugs from midnight on Wednesday 7th May, making it illegal to sell, supply or possess psychoactive substances including synthetic cannabis. (Photo by Jason Oxenham/Getty Images)

AUCKLAND, NEW ZEALAND - MAY 07:  A collection of synthetic cannabis products that were available from Treasure Box in Onehunga, Auckland on May 7, 2014 in Auckland, New Zealand. The New Zealand Parliament has outlawed synthetic cannabis  or "legal high" drugs from midnight on Wednesday 7th May, making it illegal to sell, supply or possess psychoactive substances including synthetic cannabis.  (Photo by Jason Oxenham/Getty Images)