CA Prob Code Section 16224

(a)

In the absence of an express provision to the contrary in a trust instrument, where the instrument directs or permits investment in obligations of the United States government, the trustee has the power to invest in those obligations directly or in the form of an interest in a money market mutual fund registered under the Investment Company Act of 1940 (15 U.S.C. Sec. 80a-1 et seq.) or an investment vehicle authorized for the collective investment of trust funds pursuant to Section 9.18 of Part 9 of Title 12 of the Code of Federal Regulations, the portfolios of which are limited to United States government obligations maturing not later than five years from the date of investment or reinvestment and to repurchase agreements fully collateralized by United States government obligations.

(b)

This section applies only to trusts created on or after January 1, 1985.