On and after January 1, 2007, as part of its responsibilities under Section 39607, and in order to streamline, consolidate, and unify the inventory of air emissions under one agency in state government, the state board shall prepare, adopt, and update the inventory formerly required to be adopted and updated by the State Energy Resources Conservation and Development Commission pursuant to Chapter 8.5 (commencing with Section 25730) of Division 15 of the Public Resources Code.