Anyone buying or selling scrap metal in Dacorum must now carry a special licence.
As part of efforts to stamp out black-market trade in stolen metal, dealers will need the new licence to continue operating after December 1. Registered dealers who apply by October 15 will be covered by temporary licences while their applications are determined.
As of Tuesday, it is also a criminal offence for any scrap dealer to pay for scrap metal by cash.
Visit www.dacorum.gov.uk/scrapmetal, email firstname.lastname@example.org or call 01442 228000 for more.