4 Colo. Code Regs. § 723-7-7214
Starting November 22, 2024, road authorities and railroads, railroad corporations, rail fixed guideways, transit agencies, or owners of the track are required to use Commission-approved template Construction and Maintenance Agreements and Preliminary Engineering Agreements for public crossing projects over which the Commission has jurisdiction, including the following types of public crossing projects: highway-rail at-grade crossings, grade separated crossings, pathway-rail at-grade crossings, pathway grade separated crossings, utility crossings, existing at-grade crossing modifications, relocating crossings, traffic signal interconnection, crossing status change (private to public or public to private), crossing closures, crossing active warning signal improvements, crossing passive warning improvements, and crossing surface improvements. Parties to contracts with the Colorado Department of Transportation are exempt from this requirement.
4 CCR 723-7-7214