CA Prob Code Section 1986

(a)

In a conservatorship proceeding, in addition to other procedures that may be available, testimony of a witness who is located in another state may be offered by deposition or other means allowable in this state for testimony taken in another state. The court on its own motion may order that the testimony of a witness be taken in another state and may prescribe the manner in which and the terms upon which the testimony is to be taken.

(b)

In a conservatorship proceeding, a court in this state may permit a witness located in another state to be deposed or to testify by telephone or audiovisual or other electronic means. A court of this state shall cooperate with the court of the other state in designating an appropriate location for the deposition or testimony.