The National Highway Traffic Safety Administration (NHTSA) has issued a notice of proposed rulemaking to amend Federal Motor Vehicle Safety Standard No. 110 to clarify that special trailer tires are permitted to be installed on light trailers and to “exclude these trailers from a vehicle testing requirement that a tire must be retained on its rim when subjected to a sudden loss of tire pressure when brought to a controlled stop from 97 km/h (60 mph).” Comments are requested by May 13, 2013. See Federal Register, March 13, 2013.