40 CFR 91.1007 - Display exemption.
An uncertified marine SI engine is a display engine when it is to be used solely for display purposes, will only be operated incident and necessary to the display purpose, and will not be sold unless an applicable certificate of conformity has been received or the engine has been finally admitted pursuant to subpart H of this part. A display engine is exempt without application.
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.