The State Bar's Estate Planning, Trust, and Probate Section (now the Trusts and Estates. More than 7000 lawyers statewide are members of the Trusts and Estates Section of the California Lawyers Association.Fill out TRUSTS and ESTATES SECTION - The State Bar of California online. Probate: Wills, Estates and Trusts. This section offers information about wills, trusts and estates and the court processes related to those cases. What Is Estate Planning? 2. What Is Involved in Estate Planning? Treatise and Forms provide legal analysis, practical insight, and drafting assistance for wills, trusts, and related instruments. What is a living trust? It is a written legal document that partially substitutes for a will.