Commission Decision (EU) 2023/1810 of 19 September 2023 on a request for extended cumulation between Cambodia and Vietnam, in accordance with Article 56(1) of Delegated Regulation (EU) 2015/2446, as regards the rules of origin used for the purposes of the scheme of generalized tariff preferences pursuant to Delegated Regulation (EU) 2015/2446 for certain materials or parts used in the production of bicycles