The Anchorage Assembly on Tuesday banned the manufacture of marijuana concentrates using flammable solvents like butane -- including hashish or hash oil -- without permission from authorities.

The ordinance passed unanimously, 9-0, during a special meeting on the day Alaska’s recreational marijuana law went into effect. The ordinance was introduced in early February by the administration of Anchorage Mayor Dan Sullivan.

The ordinance makes it unlawful to “manufacture a marijuana concentrate, hashish, or hash oil by use of solvents containing compressed flammable gases or through use of a solvent-based extraction method using a substance other than vegetable glycerin,” unless the person is licensed.  

Under the ordinance, such manufacture is a class A misdemeanor offense.

Butane hash oil, and particularly the dangers of its manufacturing, arose as a point of concern leading up to the Nov. 4 election, when Alaskans passed Ballot Measure 2, the initiative legalizing recreational marijuana.

The Campaign to Regulate Marijuana Like Alcohol in Alaska supported Tuesday's ordinance....