Oregon Revised Statutes Food and Other Commodities: Purity, Sanitation, Grades, Standards, Labels, Weights and Measures § 621.124

(1) A person shall not sell or offer or expose for sale any fluid milk with knowledge that the milk has been produced from a herd of cows, sheep or goats, one or more of which were infected with brucellosis at the time the milk was produced, or with knowledge that not all the animals in the herd have been tested or retested for brucellosis in a manner approved by the State Department of Agriculture.

(2) The tests described by this section shall be performed only by state veterinarians, assistant state veterinarians or deputy state veterinarians employed or appointed by the department, or by veterinarians employed by the United States Department of Agriculture.