Va. Code Ann. § 59.1-497

A public body of the Commonwealth that adopts standards pursuant to § 59.1-496 and the Secretary of Administration may encourage and promote consistency and interoperability with similar requirements adopted by other public bodies of the Commonwealth, other states and the federal government and nongovernmental persons interacting with public bodies of the Commonwealth. If appropriate, those standards may specify differing levels of standards from which public bodies of the Commonwealth may choose in implementing the most appropriate standard for a particular application.