The Greens have introduced legislation to create temporary legal defence for users, and parents and carers supplying sick children with medical cannabis.

The laws would give legal cover to a person charged with using, possessing or supplying a controlled plant, but would expire after 12 months.

Premier Will Hodgman said he was satisfied with comments from police that they had no intention of prosecuting medicinal cannabis users.

‘‘We are very keen to ensure that Tasmanians who are accessing cannabis for medicinal use are not going to be prosecuted,’’ he said.

He said the government would likely not support the laws, as he had received advice showing they could create unintended risks and consequences.

The government’s initial advice on the laws indicates there would be no limit on the quantity grown and used, and could allow someone to self-medicate.

Greens health spokeswoman Cassy O’Connor said she was disappointed at the government’s lukewarm response, as the current arrangement was unsatisfactory.

‘‘It is a very shaky and informal protection for medicinal cannabis users,’’ she said.

‘‘The law is not contemporary and the law is potentially a threat.’’

Ms O’Connor said it would now be up to the government to come up with amendments so medicinal cannabis users could be protected.

‘‘What are they prepared to negotiate in order to protect Tasmanians? The Premier needs to come forward if the bill won’t be supported,’’ she said.