To date, lithium cells and batteries have to be tested in accordance with the UN Manual of Test and Criteria Part III, Section 38.3. If satisfied, the test facility provides a summary certificate for the manufacturer that confirms that the cells or batteries meet an international standard and can be shipped around the world in accordance with relevant regulations.
The innovation is that this document must, from the new year, be made available throughout the distribution network, and this additional hurdle is causing some disquiet among lithium battery shippers.
The regulation appeared in the 2019/2020 editions of ADR (the road regulations) and the ICAO Technical Instructions and, therefore, the 60th edition of the IATA Regulations (air) as well as in Amendment 38/18 of the IMDG Code (sea). However, the regulators provided a derogation until the end of 2019, so the implications of the rule have been largely ignored – until a few weeks ago.
You can find the Manual here