California Code, Corporations Code - CORP § 405

(a) If at the time of granting option or conversion rights or at any later time the corporation is not authorized by its articles to issue all the shares required for the satisfaction of the rights, if and when exercised, the additional number of shares required to be issued upon the exercise of such option or conversion rights shall be authorized by an amendment to the articles.

(b) If a corporation has obtained approval of the outstanding shares (Section 152) for the issue of options to purchase shares or of securities convertible into shares of the corporation, the board may, without further approval of the outstanding shares (Section 152), amend the articles to increase the authorized shares of any class or series to such number as will be sufficient from time to time, when added to the previously authorized but unissued shares of such class or series, to satisfy any such option or conversion rights.