Cal. Probate Code § 4695 : California Probate Code — Health Care Decisions — Advance Health Care Directives — Revocation Of Advance Directives — Generally Date: 31 Aug 2016 TEXT PDF Current through the 2016 Legislative Session (a) A patient having capacity may revoke the designation of an agent only by a signed writing or by personally informing the supervising health care provider. (b) A patient having capacity may revoke all or part of an advance health care directive, other than the designation of an agent, at any time and in any manner that communicates an intent to revoke. Ca. Prob. Code § 4695 EFFECTIVE 7/1/2000. Added October 10, 1999 (Bill Number: AB 891) (Chapter 658).