California Code, Probate Code - PROB § 3100

(a) As used in this chapter, “transaction” means a transaction that involves community real or personal property, tangible or intangible, or an interest therein or a lien or encumbrance thereon, including, but not limited to, those transactions with respect thereto as are listed in Section 3102.

(b) However, if a proposed transaction involves property in which a spouse also has a separate property interest, for good cause the court may include that separate property in the transaction.