The guidance applies to both the medical and adult use marijuana markets.
The industry is split over efforts to keep marijuana license details secret, but opposes a bill that would drive up the price of edibles, salves and tinctures.
The convictions, which date back to 1961, disproportionately impacted minorities.
Mandatory seed to sale tracking will be implemented for the adult use marijuana program this spring, with the medical program to follow.
Absent a fix during this legislative session, the first adult use marijuana stores in Maine will have a very limited supply of product.