Section 164.139-4 - Approval procedures(a) Manufacturers that desire type approval should submit a written notice to the Commandant (CG-ENG-4) describing the product and its intended uses. The Commandant will evaluate this information and notify the manufacturer of the product's suitability for testing. The manufacturer should then contract directly with an accepted independent laboratory to perform the required tests and inspections.(b) Upon completion of the required testing and inspections, the manufacturer must submit either a written request for type approval to the Commandant (CG-ENG-4), United States Coast Guard, 2703 Martin Luther King Jr. Avenue SE., Stop 7509, Washington, DC 20593-7509, or electronically submit a request to typeapproval@uscg.mil. The request must indicate the name and address of the manufacturer, all product designations, and the address of all manufacturing facilities. The request must include a copy of the final fire test report and the production inspection procedures. From the information submitted, the Commandant determines whether or not the product is acceptable for type approval. If the product is determined to be acceptable, a type approval certificate valid for a 5-year period will be issued. If the product is not accepted, the manufacturer will be notified of the reasons why.