Va. Code Ann. § 13.1-728.2

Unless, at the time of any control share acquisition with respect to a public corporation, such corporation's articles of incorporation or bylaws provide that this article does not apply to acquisitions of shares of such corporation, shares of such corporation acquired in such control share acquisition have only such voting rights as are conferred by § 13.1-728.3. Unless by midnight of the fourth day following (i) the receipt by the secretary of the corporation at the principal office of the corporation, of a notice expressly and specifically describing a proposed control share acquisition, or (ii) in case the proposed control share acquisition is to be made by tender offer, a public announcement, the corporation's articles of incorporation or bylaws provide that this article does not apply, then the provisions of § 13.1-728.3 shall apply to shares to be acquired in such control share acquisition.