Achievements include eliminating the use of chlorofluorocarbons (CFCs) in refrigerator manufacturing and the manufacture of polyurethane and polystyrene, halting halon imports for use in fire extinguishers, prohibiting the use of methyl bromide in agricultural applications and eliminating the use of carbon tetrachloride and imports of methyl chloroform (UNEP, 2013). Licences for the production and import of ODS have been required since 1993 (under article 52 of Law 99). A dozen regulations have been issued to broaden and strengthen measures designed to meet international treaty commitments.