The update regarding Massachusetts laws on seatbelt usage is that there is no update. As it has stood since 1994 in most respects, all motorists and passengers must wear seat belts, however, law enforcement has no right to pull you over for your failure to buckle up. To be detained by a traffic officer and be cited for not wearing a seatbelt, and to cite you for any of your passengers failure to be restrained, you must have violated some other traffic law. This is known as secondary enforcement. If you are stopped for speeding or running a red light or for any other traffic code offense and the officer sees you are not belted, the fine is only $25. You pay an additional $25 for each passenger who is not wearing a seat belt.