When is a tow truck driver required to wear a helmet?

The answer is now.

ABC News reported Friday that the Federal Motor Carrier Safety Administration (FMCSA) has finalized a rule that requires drivers of commercial tow trucks to wear helmets while on the job.

Under the new rule, drivers must wear helmets when the truck is in motion and in “extreme” conditions, including the high seas and in snow.

The rule also requires that all tow truck drivers wear helmets in “all hazardous situations” and that the driver wear a mask when driving on the highway.

The rules are expected to be finalized by mid-May, according to FMCSA.

The rule was finalized as part of the administration’s efforts to modernize the nation’s fleet of commercial trucks, which have long been considered a threat to air quality.