A separate landbook shall be made for each county or city if the district is located in more than one county or city. The landbook or landbooks of all properties subject to the district tax or the service charge, along with the tax rate or service charge rate fixed by the governing body of the district for that year, shall be certified to the appropriate county or city treasurer or treasurers, and filed in the clerk's office of such locality or localities, by the governing body of the watershed improvement district on or before the day the county or city landbook is required to be so certified. Such landbook or landbooks shall be subject to the same retention requirements as the county or city landbook.
Va. Code § 10.1-626