(a) That the proportion of shares, or the proportion of shares of any class or series thereof, the holders of which shall be present in person or by proxy at any meeting of stockholders in order to constitute a quorum for the transaction of any business or of any specified item of business, including amendments to the organization certificate, shall be greater than the proportion prescribed by this chapter in the absence of such provision.

(b) That the proportion of votes of the holders of shares, or of the holders of shares of any class or series thereof, that shall be necessary at any meeting of stockholders for the transaction of any business or of any specified item of business, including amendments to the organization certificate, shall be greater than the proportion prescribed by this chapter in the absence of such provision. 2. An amendment of the organization certificate which adds a provision permitted by this section or which changes or strikes out such a provision, shall be authorized at a meeting of stockholders by vote of the holders of two-thirds of all outstanding shares entitled to vote thereon, or of such greater proportion of shares or class or series of shares, as may be provided specifically in the organization certificate for adding, changing or striking out a provision permitted by this section. 3. If the organization certificate of any corporation contains a provision authorized by this section, the existence of such provision shall be noted conspicuously on the face or back of every certificate for shares issued by such corporation.