Maryland Code, Public Utilities § 12-130

(i) performs the excavation duties for the duration of a ticket;

(ii) initiates the notification to the one-call system to establish a ticket;

(iii) is on site to supervise all activities and employees; and

(iv) intends to utilize services or equipment of a temporary excavator.

(i) notify the one-call system when a temporary excavator is to begin work under the ticket;

(ii) inform the temporary excavator of the exact scope of work as detailed on the existing ticket;

(iii) directly supervise the on-site activities of the temporary excavator; and

(iv) assume all liability if damage should occur to an underground facility by any person named as a temporary excavator on the existing ticket; and

(i) a piece of rental equipment and its operator;

(ii) an excavation contractor that is not an employee of the primary contractor; or

(iii) an equipment operator that is not a direct employee of the primary contractor.