Section 1051.201 - What are the general requirements for obtaining a certificate of conformity?(a) You must send us a separate application for a certificate of conformity for each engine family. A certificate of conformity is valid starting with the indicated effective date, but it is not valid for any production after December 31 of the model year for which it is issued. No certificate will be issued after December 31 of the model year.(b) The application must contain all the information required by this part and must not include false or incomplete statements or information (see § 1051.255 ).(c) We may ask you to include less information than we specify in this subpart, as long as you maintain all the information required by § 1051.250 .(d) You must use good engineering judgment for all decisions related to your application (see 40 CFR 1068.5 ).(e) An authorized representative of your company must approve and sign the application.(f) See § 1051.255 for provisions describing how we will process your application.(g) We may require you to deliver your test vehicles or engines to a facility we designate for our testing (see § 1051.235(c) ).(h) For vehicles that become new after being placed into service, such as vehicles converted to run on a different fuel, we may specify alternate certification provisions consistent with the intent of this part. See§ 1051.650 and the definition of "new" in § 1051.801 . 70 FR 40492 , July 13, 2005, as amended at 73 FR 59248 , Oct. 8, 2008; 75 FR 23024 , Apr. 30, 2010