Corp. Code, § 706

(a) Notwithstanding any other provision of this division, an agreement between two or more shareholders of a corporation, if in writing and signed by the parties thereto, may provide that in exercising any voting rights the shares held by them shall be voted as provided by the agreement, or as the parties may agree or as determined in accordance with a procedure agreed upon by them, and the parties may but need not transfer the shares covered by such an agreement to a third party or parties with authority to vote them in accordance with the terms of the agreement. Such an agreement shall not be denied specific performance by a court on the ground that the remedy at law is adequate or on other grounds relating to the jurisdiction of a court of equity.

(b) Shares in any corporation may be transferred by written agreement to trustees in order to confer upon them the right to vote and otherwise represent the shares for such period of time, not exceeding 10 years, as may be specified in the agreement. The validity of a voting trust agreement, otherwise lawful, shall not be affected during a period of 10 years from the date when it was created or last extended as hereinafter provided by the fact that under its terms it will or may last beyond such 10-year period. At any time within two years prior to the time of expiration of any voting trust agreement as originally fixed or as last extended as provided in this subdivision, one or more beneficiaries under the voting trust agreement may, by written agreement and with the written consent of the voting trustee or trustees, extend the duration of the voting trust agreement with respect to their shares for an additional period not exceeding 10 years from the expiration date of the trust as originally fixed or as last extended as provided in this subdivision. A duplicate of the voting trust agreement and any extension thereof shall be filed with the secretary of the corporation and shall be open to inspection by a shareholder, a holder of a voting trust certificate or the agent of either, upon the same terms as the record of shareholders of the corporation is open to inspection.

(c) No agreement made pursuant to subdivision (a) shall be held to be invalid or unenforceable on the ground that it is a voting trust that does not comply with subdivision (b) or that it is a proxy that does not comply with Section 705.

(d) This section shall not invalidate any voting or other agreement among shareholders or any irrevocable proxy complying with subdivision (e) of Section 705, which agreement or proxy is not otherwise illegal.