On 1 January 2023, another amendment to the provisions of the Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) entered into force. As in the case of the previous amendments, a six-month transition period was introduced. This means that until 30 June 2023 either the ADR provisions in the 2021 version (ADR 2021) or the ADR provisions of 2023, upon their publication in the Official Journal (ADR 2023), can be applied, whereas from 1 July – only the ADR 2023. In some specific cases there are other transition periods.