Michigan Compiled Laws, Chapter 460. Public Utilities § 460.726

Sec. 6. (1) The notification system shall receive dig notice notification of proposed excavation and blasting activities and promptly transmit a ticket to facility owners or facility operators of facilities in the area of the proposed excavation or blasting. The notification system shall provide alternative means of access and notification to the system. Except for shutdowns caused by acts of nature, war, or terrorism, the notification system shall be available 24 hours per day, 7 days per week.

(2) The notification system shall publicize the availability and use of the notification system and educate the public, governmental agencies, excavators, farm operators, facility owners, and facility operators regarding the practices and procedures of the notification system, the requirements of this act, and practices to protect underground facilities from damage.

(3) The notification system shall administer a positive response system to allow excavators to determine whether all of the facility owners or facility operators in the area have responded to a ticket and whether a particular facility owner or facility operator does not have facilities in the area of a proposed excavation or blasting.

(4) The notification system shall maintain adequate records of its notification activity for a period of 6 years after the date of the notice, including voice recordings of calls. The notification system shall provide copies of those records to any interested person upon written request and payment of a reasonable charge for reproduction and handling as determined by the notification system.

(5) The notification system shall expedite the processing of any emergency notice it receives under this act.

(6) The notification system shall receive design tickets under the procedures described in section 6a  1 and transmit them to facility owners or facility operators.