The HPA and ATPL theory requirement

The CBIR is available for aeroplanes only. The privileges of the CBIR do not include flying ‘high-performance aeroplanes’ (HPA) under IFR unless further theoretical knowledge is obtained.

Learning objectives for complex and high-performance aircraft have been shifted to a separate, later exam for those progressing beyond light aircraft, so the full IR is now more appropriate for private pilots adding the rating.