Va. Code Ann. § 3.2-5223

The Board is authorized to adopt and enforce regulations governing applications for certificates and the granting of certificates. The Board may, in its discretion, revoke the authority of any holder of a certificate who, in its opinion, is not correctly manipulating any Babcock or other centrifugal machine, or correctly sampling or weighing milk or cream or is using dirty or otherwise unsatisfactory glassware or utensils. The Board is authorized to fix such standards and to adopt such regulations as may be deemed necessary to carry out the provisions of this article.