Minn. Stat. § 32D.14: OFFICIAL PRODUCER SAMPLES.

(a) An official producer sample for each producer must be analyzed for bacteria, somatic cell count, temperature, and antibiotic residues at least once per month in four out of every six months. Official producer samples must be collected and analyzed without providing the producer with prior notification of the sampling date.

(b) Official producer sample results must be inclusive of all animals from which milk is collected and sold on the day of sampling.

(c) Official producer sample results must be collected by a licensed sampler.