Special sessions may be called by the governor or by vote of two-thirds of the legislators. The vote may be conducted by the legislative council or as prescribed by law. At special sessions called by the governor, legislation shall be limited to subjects designated in his proclamation calling the session, to subjects presented by him, and the reconsideration of bills vetoed by him after adjournment of the last regular session. Special sessions are limited to thirty days. [Amended 1976]