Subject to paragraph 2, upon request of an account holder, the central administrator shall ensure that the Union Registry carries out a transfer of allowances to any other account unless such a transfer is prevented by the status of the initiating or receiving account.

Operator holding accounts and aircraft operator holding accounts may only transfer allowances to an account on the trusted account list set up pursuant to Article 23.

Holders of operator holding or aircraft operator holding accounts may decide that transfers are possible from their account to accounts not on the trusted account list set up pursuant to Article 23. Holders of operator holding or aircraft operator holding accounts may withdraw such decision. The decision and withdrawal of the decision shall be communicated in a duly signed statement submitted to the national administrator.

Upon initiation of a transfer, the authorised representative initiating the transfer shall indicate in the Union Registry if the transfer represents a bilateral transaction unless that transaction is registered at a market venue, or it is cleared at a central counterparty, or it represents a transfer between different accounts of the same account holder in the Union Registry.