Maryland Public Utility Companies Section 12-203

      (a)      (1)      Excluding Saturdays, Sundays, and holidays, not more than 48 hours before the start of the work described in § 12-202 of this subtitle, a public service company shall mark on the ground by staking, painting, or other suitable means the horizontal location and size of its underground lines and structures indicating the center of the line and its size or the sides of the structure.

            (2)      The public service company shall mark, as appropriate, within 3 feet of the center of the underground utility line or the side of the underground utility structure.

            (3)      If the underground structure is a cable or cables, the public service company shall include in the marking the number of cables.

      (b)      If a public service company cannot mark the work site because of extraordinary circumstances within the time required under subsection (a) of this section, the public service company shall so notify the County and the person that made the request for information under § 12-202 of this subtitle of the date and time the work site will be marked.