Va. Code § 17.1-236
All plats and maps may in the discretion of the clerks of the several circuit courts be recorded in a book to be known as the plat book. In case of such recordation of any plat or map which is attached to or made a part of any deed, deed of trust or writing which is recorded in the deed book, an appropriate note shall be made on the deed book where such deed, deed of trust or other writing is recorded, referring to the plat book and page where the plat or map is recorded and the clerk shall endorse on the plat and plat book the date of the recordation and a reference by book and page to the recorded instrument of which it is a part and shall sign the certificate. In those courts where deeds and other writings are recorded by a procedural microfilm recording system, all plats shall be recorded with the deeds and other writings and indexed in the general index to deeds. Wherever plats are maintained singly, as in a cabinet or on microfilm aperture cards, they shall be cross-referenced with the deed books in the same manner as prescribed herein when plats are recorded in a separate plat book. All plats submitted for recordation shall meet the standards for plats as adopted under § 42.1-82 of the Virginia Public Records Act (§ 42.1-76 et seq.).
Va. Code § 17.1-236