Laws that would legalise cannabis for personal use could be passed next week but the government has warned possessing and growing the drug could still carry a risk of prosecution. The ACT government will introduce amendments to the private members bill it hopes will resolve those potential conflicts with Commonwealth law. The government has also flagged the possibility of the federal government intervening to override the laws. The bill, which would legalise the possession of 50 grams of cannabis for adults, was introduced by Labor backbencher Michael Pettersson about a year ago.