194.4  Physical characteristics.
  All milk received at a creamery, cheese factory, or milk-processing plant shall be examined for physical characteristics, off-flavors and off-odors, including those associated with developed acidity. The condition of the raw milk shall be wholesome and characteristic of normal milk. The flavor and odor of the raw milk shall be fresh and sweet; however, slight feed flavors may be present.
  Any raw milk that shows an abnormal condition including, but not limited to, curdled, ropy, clotted and bloody, or that contains extraneous matter or which shows significant bacterial deterioration, or which contains matter evidencing production from a mastitic cow; or which contains chemicals, medicines, or radioactive agents deleterious to health is unlawful milk and shall be rejected to the producer, seller, or shipper and shall not be used in the processing or manufacturing of dairy products for human consumption.
  At least once within each thirty days a test shall be made of a producer’s milk to determine the existence of evidence of production from mastitic cows. The secretary shall determine and adopt the standards and methods of testing the milk for this purpose. The secretary shall be guided by recommendations or regulations established by federal agencies regulating this field.
[C62, 66, 71, 73, 75, 77, 79, 81, §194.4]
92 Acts, ch 1081, §2