Maine Democratic Gov. Janet Mills plans to sign a law setting up a legal framework for the sale of recreational marijuana to adults.
A spokesperson says Friday that she intends to do so in coming days.
Maine voters approved of legalizing marijuana in a public vote in 2016 but sales have long been delayed.
State officials say marijuana for adult recreational use could arrive in stores as soon as early 2020. Medical marijuana is already legal in the state.
Maine's law would limit licenses to state residents for the first two years.
Municipalities could opt in or out of allowing marijuana sales. Only a handful of cities and towns have laid the groundwork for retail sales.