“We are now crossing the T’s and dotting the I’s,” said Shannon O’Brien, the commission’s chair, at a meeting earlier this month. “We are 99 percent there.”

Commissioners had previously said they were hoping to vote on social consumption by Christmas after repeated delays, including O’Brien’s reinstatement as chair in September and the appointment of Commissioner Carrie Benedon in November.

Thursday’s 10 a.m. meeting is the last one scheduled for the commission before the holiday break.

The draft regulations introduce three new license types: add-on spaces or “tasting rooms” for existing cannabis businesses such as dispensaries; a temporary events license; and a third category for typically non-cannabis-related hospitality businesses such as restaurants, theaters, and yoga studios that want to partner with marijuana establishments.

Supporters of social consumption and commissioners have said it will improve public safety, health, and economic opportunities for the industry, which has sold $8 billion worth of cannabis products since pot stores first opened in 2018.

Still, the commission has offered few details about the timeline of its rollout.

If the commission approves the license type, towns and cities will still need to opt in for social consumption through resident petitions, or adopting new ordinances or zoning regulations, before allowing for businesses to be established.

The city of Somerville, for example, has already begun soliciting public comments on social consumption, although no official decision has been made as of this time, according to a spokesperson in theMayor’s Office of Strategic Planning and Community Development.

“The city will first need to review the finalized state regulations and consult internally on public health and safety considerations before bringing any recommendations to the incoming administration and City Council,” the spokesperson said in a statement.

The draft rulesdetail requirements for social consumption businesses, such as strict ventilation and air filtration systems for indoor businesses, cannabis-free “cooling down areas” for customers, and the types and amounts of products allowed. Alcoholic beverages, tobacco products, and prepared cannabis-infused foods won’t be allowed,though prepackaged edibles will be permitted.

At times, social consumption felt like a pipe dream for hopeful entrepreneurs.

The concept of social consumption in Massachusetts first appeared in the 2016 ballot initiative that legalized cannabis, but since then has gone through numerous delays and false starts, including an issue in the state’s marijuana law that complicated municipalities’ abilities to opt in to hosting the businesses.

The state also scrapped a planned pilot program in 2023 that would have tested social consumption in a dozen communities and measured in part whether it had an impact on impaired driving.

Approving social consumption, which has been on the commission’s agenda for years, would be an accomplishment for a commission long mired in controversies and upheaval. O’Brien’s legal battle with the state treasurer drew attention to the regulatory body’s internal squabbles. The state auditor in August released a report pointing at widespread mismanagement at the commission. Commissioner Ava Callendar Conception resigned in November after being on leave for months. And the Legislature is advancing a bill to restructure and shrink the agency.

If the social consumption regulationspass, Massachusetts will join 12 states that allow businesses to hostsome level of on-site pot consumption, including Alaska, California, New Jersey, and Illinois.

Yogev Toby can be reached at yogev.toby@globe.com.