In accordance with ATP, Annex 1, Appendix 1, paragraphs 1, 1(a), 2(a), 2(b), 2(c) and 3, and Appendix 2, paragraph 41, certification of new equipment is based upon the following:

1. (a) For a unit of equipment, a test of the equipment in an approved testing station.

2. (b) For serially-produced equipment:

   1. (1) A test of one unit of equipment in an approved testing station, such unit to serve as the reference equipment.
   2. (2) Verification that production of other units of equipment is in conformity with the reference equipment.
3. (c) For mechanically refrigerated equipment, certification may be based upon a separate test of the mechanical refrigerating appliance and a separate test of the insulated body.