http://www.rfc-editor.org/rfc/rfc4476.txt
RFC 4476: Attribute Certificate (AC) Policies Extension, C. Francis, D. Pinkas2006-05-01T23:00:00-00:00This document describes one certificate extension that explicitly states the Attribute Certificate Policies (ACPs) that apply to a given Attribute Certificate (AC). The goal of this document is to allow relying parties to perform an additional test when validating an AC, i.e., to assess whether a given AC carrying some attributes can be accepted on the basis of references to one or more specific ACPs. [STANDARDS-TRACK]