Wearing a helmet is: Question Wearing a helmet is: Answers Required for both operators and passengers. Required only for passengers. Required only for operators under the age of 21. Optional for both operators and passengers. Explanation Helmet use by motorcycle operators and passengers is mandatory under Massachusetts law. A DOT-compliant motorcycle safety helmet is a rider's best protection against head and neck injuries in the event of an accident. This questions appears in the following tests: Massachusetts Motorcycle Practice Test 12