Md. Code, Pub. Util. § 12-131

(a) In connection with a project that may require excavation or demolition, a person may initiate a nonexcavation designer ticket request by notifying the one–call system serving the geographic area covering the planned project in accordance with this section. (b) (1) In connection with a project that may require excavation or demolition, a person initiating a nonexcavation designer ticket request under this section: (i) may initiate only one ticket request for a single project by notifying the one–call system serving the geographic area covering the planned project; and (ii) shall, in connection with a nonexcavation designer ticket request: 1. indicate that the request is for design purposes only and may not be used for the purpose of excavation or demolition; 2. notify the one–call system of any owner–members from which the person does not require underground facilities information; and 3. on the request of an owner–member, provide the owner–member with a preliminary drawing that indicates the scope of the project. (2) The one–call system shall provide the person requesting a nonexcavation designer ticket an accurate means of contact for each underground facility within 2 business days. (3) Each underground facility owner shall maintain current valid contact information with the one–call system for persons to contact. (c) (1) Within 15 business days after receiving notice from a one–call system that a person has made a request under this section, an owner–member of an underground facility in the area of the project shall notify the person of the type and approximate location of the underground facility. (2) An owner–member may provide notice of the approximate location of an underground facility through the use of: (i) field locates; (ii) maps; (iii) surveys; (iv) installation records; or (v) other similar means. (d) In the case of an obstruction caused by a suspected cross–bore: (1) the person intending to remove the obstruction shall notify the one–call system and request a nonexcavation ticket for a suspected cross–bore which will be transmitted to all pertinent owner–members in the geographic area indicated for that ticket; and (2) each owner–member shall take whatever action it considers necessary to respond to this notification. (e) (1) Information provided to a person requesting marking under this section is for informational purposes only. (2) An owner–member or agent of an owner–member may not be held liable for any inaccurate information provided to a person under this section.