Probate Code § 15206

A trust in relation to real property is not valid unless evidenced by one of the following methods:

(a) By a written instrument signed by the trustee, or by the trustee’s agent if authorized in writing to do so.

(b) By a written instrument conveying the trust property signed by the settlor, or by the settlor’s agent if authorized in writing to do so.

(c) By operation of law.