A quote from IATA:
ICAO has now issued Addendum 4 to the 2015-2016 edition of the Technical Instructions to address the prohibition of lithium ion batteries, UN 3480, on passenger aircraft with effect 1 April 2016. As a consequence attached is the English addendum to the 57th edition of the Dangerous Goods Regulations. The language editions will follow early next week. There will also be updates to the eDGR and to the Lithium Battery Shipping Guidelines (LBSG) in all applicable languages. These should also be rolled out starting next week.
The 2016 edition of the lithium battery guidance document that was issued recently will be updated to include some specific guidance to shippers on how to determine the SoC of a lithium cell or battery and other questions that have emerged from the last addendum and the notice on the changes applicable to lithium batteries.
Note, there is no requirement for the shipper to specifically prove that lithium ion batteries shipped as UN 3480 are at 30% SoC, or for the operator to somehow verify that the lithium ion batteries are at no more than 30% SoC. The shipper by signing the Shipper’s Declaration for Dangerous Goods is certifying that “I declare that all of the applicable air transport requirements have been met.” This is a legal declaration. This is no different to a shipper stating on the Shipper’s Declaration that the flammable liquid is actually Packing Group II, or that the dangerous goods are as described by the UN number and proper shipping name shown.