Section 634 Of Article 2. Scope Of Donee’s Authority From California Probate Code >> Division 2. >> Part 14. >> Chapter 4. >> Article 2.

. A power of appointment created in favor of two or more donees can only be exercised when all of the donees unite in its exercise. If one or more of the donees dies, becomes legally incapable of exercising the power, or releases the power, the power may be exercised by the others, unless expressly prohibited by the creating instrument.