Code of Maine Rules
10 - DEPARTMENT OF HEALTH AND HUMAN SERVICES
144 - DEPARTMENT OF HEALTH AND HUMAN SERVICES - GENERAL
Chapter 250 - RULES RELATING TO SMOKING IN THE WORKPLACE
Section 144-250-4 - Requirements and Guidelines for Smoking Outdoors

An employer may designate an area outdoors for smoking provided that is a minimum 20 feetfrom windows, entryways, vents, doorways or other openings and it is not in a location that will allow circulation of environmental tobacco smoke into the enclosed areas of the business facility, or a public place, in any way, e.g., through the ventilation system, open windows, and open doors, or any outdoor area where smoking is prohibited by law. An area for smoking outdoors may be constructed to protect employees from the weather as long as it is not an "enclosed area" within the meaning of Section 2(G) of these Rules.

Smoking is prohibited in enclosed areas of business facilities.