Compare with the advice/requirement for pilots to follow TCAS RAs. I don't think TCAS discriminates between CAS and outside CAS, just to follow it.
That's a good comparison, and in the case of following a TCAS RA in breach of the Rules of the Air, the commander is still required to report the incident to the CAA:
http://www.ais.org.uk/aes/pubs/aip/pdf/aic/4P194.PDF