The K-coefficient shall be measured according to the procedures in ATP, Annex 1, Appendix 2, paragraphs 1-28, and the following shall apply:
(a) The internal heating method shall be used.
(b) In ATP, Annex 1, Appendix 2, paragraph 8, last line, ``about +20 [deg]C for the mean temperature of the walls of the body shall be interpreted to mean between +19 [deg]C (+66 [deg]F) and 21 [deg]C (+70 [deg]F).
(c) A report of each test shall be completed on a form corresponding to the pertinent test report model prescribed in ATP, Annex 1, Appendix 2. Report forms may be obtained by a request to the ATP manager.