Cal. Code Regs. tit. 18, § 13551
(b) Decedents Dying Prior to September 11, 1957. In the case of a decedent who died prior to September 11, 1957:
(2) If the property was acquired prior to July 29, 1927, the husband is considered the transferor of the entire property.
(See also Section 13554.)
Note: Reference: Section 13551, Revenue and Taxation Code.
The whole of any community property which is transferred by means of a taxable inter vivos transfer by the spouses to a third person is subject to the Inheritance Tax Law.