551.53—What is the required format for a designation?
(c)
As long as documents submitted by a foreign manufacturer and its agent contain all required information (identified in §§ 551.54, 551.55 and 551.56 below), there is no mandatory format for the designation
(d)
NHTSA encourages foreign manufacturers to use the suggested designation form set forth in the appendix to this subpart. If completed and executed properly by both a foreign manufacturer and its agent, this form will comply fully with the requirements of §§ 551.53 through 551.65.