Maine Is #1 in Public Safety After Passing Constitutional Carry Law Here's why Maine is now the safest state in the Union. On October 15, 2015, Maine’s Constitutional Carry law went into effect. Residents and non-residents that are legally allowed to possess a firearms and are at least 21 years old are allowed to carry concealed in Maine. Active Military and Honorably Discharged Veterans can carry at the age of 18. Maine is a Shall Issue State and still issues Concealed Handgun Permits to residents of Maine and non-residents. Even though they allow anyone legally allowed to possess a firearm to carry concealed, they still issue concealed carry permits. From The American Thinker: Guns in the hands of honest citizens decrease crime. That is fact that has been statistically demonstrated by John Lott’s pathbreaking book, More Guns, Less Crime, a rick-solid statistical analysis showing that when states pass “shall issue” concealed carry laws, crime goes down. The San Francisco Board of Supervisors should take note. Maine is Numero Uno in public safety, What State is #2? Vermont, which also has a constitutional carry law.