4 Va. Admin. Code § 20-190-40
The stretched mesh will be determined by computing the average of the 50 measurements which will yield the average stretched mesh measurement and this average shall be equal to or greater than 1-3/4 inches (44.45 millimeters).
§ 28.2-201 of the Code of Virginia.
Derived from VR450-01-0025; § 4, eff. February 2, 1981; amended, Virginia Register Volume 11, Issue 25, eff. August 3, 1995.