‹ GR-5.3 Suitability of Controllers GR-5.3.1A › GR-5.3.1 Past version: Effective from 22 May 2011 to 31 Mar 2012 To view other versions open the versions tab on the right Licensees must satisfy the CBB of the suitability of their (proposed) controllers. May 2011 ‹ GR-5.3 Suitability of Controllers GR-5.3.1A ›