‹ AU-2.3.1 AU-2.3.3 › AU-2.3.2 Past version: Effective from 01 Jul 2007 to 30 Sep 2009 To view other versions open the versions tab on the right Chapters GR-5 and GR-6 contain the CBB's requirements and definitions regarding controllers and close links. Amended: July 2007 ‹ AU-2.3.1 AU-2.3.3 ›