Article 31a 4.

Where guarantees of origin have been issued for the production of a consignment of renewable gas, Member States shall ensure that those guarantees of origin are transferred to the Union database at the moment when a consignment of renewable gas is registered in the Union database and are cancelled after the consignment of renewable gas is withdrawn from the Union’s interconnected gas infrastructure. Such guarantees of origin, once transferred, shall not be tradable outside the Union database.