All VSFs shall have an all-weather surface such as concrete, asphalt, black-top, stone, macadam, limestone, iron ore, gravel, shell, or caliche, that enables the safe and effective movement of stored vehicles upon all portions of the lot, both under their own power and under tow, at all times, regardless of prevailing weather conditions. The surface shall also be free of overgrown vegetation.
16 Tex. Admin. Code § 85.1001