30 December 2019, Muscat ̶ Illegal trade in substances controlled by the Montreal Protocol on Substances that Deplete the Ozone Layer, such as hydrochlorofluorocarbons (HCFCs), undermines national commitments under this international environmental agreement. It also violates national laws, deprives the government of rightful income, and supports other forms of illegal activity. Customs officials worldwide, including those in Oman, are highly committed to protecting their borders by fighting this illicit chemical trade.