CA Gov't Code Section 9402

A subpoena is sufficient if it:

(a)

States whether the proceeding is before the Senate, Assembly, or a committee.

(b)

Is addressed to the witness.

(c)

Requires the attendance of the witness at a time and place certain.

(d)

Is signed by the President of the Senate, Speaker of the Assembly, or chairman of the committee before whom attendance of the witness is desired.