In municipalities with naturally asbestos-rich areas, exemptions may be granted from the obligation to measure dust levels and, where applicable, to carry out the work provided for in articles R. 1334-27 and R. 1334-28 , as well as from the obligation to measure dust levels following completion of the work, as provided for in article R. 1334-29-3. The list of municipalities concerned and the terms and conditions of this derogation are defined, where applicable, by order of the ministers responsible for the environment and health, issued after consulting the Haut Conseil de la santé publique.