When the city does work in the right-of-way and finds it necessary to maintain, support or move a registrant's facilities to protect it, the city shall notify the local representative as early as is reasonably possible. The costs associated therewith will be billed to that registrant and must be paid within 30 days from the date of billing. Each registrant shall be responsible for the cost of repairing any facilities in the right-of-way which it or its facilities damage. Each registrant shall be responsible for the cost of repairing any damage to the facilities of another registrant caused during the city's response to an emergency occasioned by that registrant's facilities.