(a) Duty to update.--Not less than once every three months, a map that has been provided to a city, at the request of council, pursuant to section 12204 (relating to operators to furnish maps and contents) shall be updated at the direction of the mine owner, operator or superintendent.
(b) Contents.--The updated map shall show all the extensions made in any mine within the limits of the city, in whole or in part, and not already so placed upon the map, except those made within 30 days immediately preceding the time of placing the extensions upon the map.