Va. Code Ann. § 8.01-412.14

In applying and construing this uniform act, consideration shall be given to the need to promote uniformity of the law with respect to its subject matter among states that enact it. The privilege extended to persons in other states for discovery under this article shall only apply if the jurisdiction where the action is pending has extended a similar privilege to persons in the Commonwealth, by that jurisdiction's enactment of the Uniform Interstate Depositions and Discovery Act, a predecessor uniform act, or another comparable law or rule of court providing substantially similar mechanisms for use by out-of-state parties.