Va. Code § 1-607
No coordinates based on the Virginia coordinate systems, purporting to define the position of a point on a land boundary, shall be presented to be recorded in any public land records or deed records unless such point is within two kilometers of a public or private monumented horizontal control station established in conformity with the standards of accuracy and specifications for second-order, class II or better geodetic surveying as prepared and published by the Federal Geodetic Control Subcommittee of the Federal Geographic Data Committee of the U.S. Department of Commerce. Standards and specifications of the Federal Geodetic Control Subcommittee or its successor in force on the date of such survey shall apply. The publishing of the existing control stations, or the acceptance with intent to publish the new established control stations, by the National Ocean Service/National Geodetic Survey constitutes evidence of adherence to the Federal Geodetic Control Subcommittee specifications. The two kilometers' limitation may be modified by a duly authorized state agency to meet local conditions. Nothing contained in this chapter shall be interpreted as preventing the use of the Virginia coordinate systems in any unrecorded deeds, maps, or computations.
Va. Code § 1-607