PORTLAND – A new law taking effect today in Maine’s largest city will prohibit smoking within the outdoor areas of restaurants and bars where beverage or dining service is available, but smokers will be allowed to light up after 10 p.m.

Portland City Council enacted the ordinance to decrease the public’s exposure to secondhand smoke. Maximum fines for violators are $100.

The city of about 64,000 people has more than 60 restaurants and bars with outdoor dining areas.

Some bar owners opposed the ordinance, questioning whether it will be effective.