The present document provides guidance on interpreting the requirements specified in TS 101 456 (V1.4.1) [15]. This guidance is intended for use by bodies that supervise (e.g. as per Directive articles 3.3), approve or accredit CAs (e.g. as per articles 3.2 of Directive [1]), assessors, certification service providers and other interested parties. The present document purpose is to facilitate assessors in evaluating compliance of certification authorities with TS 101 456 [15] and, consequently, to facilitate certification authorities in implementing TS 101 456 [15] requirements. The original text of TS 101 456 [15] is repeated in the present document to provide a comprehensive source