(A) When milk or cream is tested for milkfat for the purpose of determining the price to be paid for the milk or cream, the Babcock test, Roese Gottlieb test, turbidimetric test or infrared test method shall be used.
(B) When the turbidimetric test or infrared test method is used, then either the Babcock test or the Roese Gottlieb test method shall be used as the equipment calibration method.
(C) Persons desiring to perform the turbidimetric test or infrared test method shall also be licensed for either the Babcock test or Roese Gottlieb test method.
(D) All test equipment shall be operated and conducted in accordance with the test equipment manufacturer's manual. Any person performing the tests, shall have conveniently available the current operation manual for the test equipment being used, and any laboratory facilities, apparatus or reagents called for by the operation manual. When the Babcock test, Roese Gottlieb test, turbidimetric test or infrared test method is used, the procedures set forth in the "Official Methods of Analysis of the AOAC International (OMA)", 17th edition, Dr. William Horwitz, editor, published by AOAC International, Suite 500, 481 North Frederick Ave., Gaithersburg, Maryland 20877-2417 USA shall be followed.
(E) Testers shall only use a test method for which they have been licensed to determine producer payment for milk or cream.
(F) Testers shall maintain complete and accurate records of the reading of each sample with the producer's name and number. The tester shall indicate the date of testing and period covered by the sample and shall sign the report and give his license number. The original tester's report shall be kept on file in the plant or laboratory for six months following the date of testing.