Va. Code Ann. § 55.1-2172

In the case of a sale of a cooperative interest where delivery of a public offering statement is required, a contract of sale may be executed, but no interest in that cooperative interest may be conveyed, except pursuant to subsection B of § 55.1-2176, until the declaration is recorded and the unit that is a part of that cooperative interest is substantially completed, as evidenced by a recorded certificate of substantial completion executed by an independent, registered architect, surveyor, or engineer or by issuance of a certificate of occupancy authorized by law.