Unlike Instructors, Trainers (ITs & ITEs) are far more heavily immersed in application of the SEIC (Safety Education & Instruction Council) Policies & Procedures.  These change periodically via the SEIC Motion process and changes are voted on by the SEIC during semi-annual meetings and approved by the ACA Board of Directors.  ITs when conducting an Instructor Update need to inform their candidates of applicable changes.  That said, ITs should review the SEIC Policy Manual on an annual basis as part of their continual education.