party in accordance with the arbitration procedure prescribed in the Constitution and rules then obtaining of the New York Stock Exchange."
In January 1967, plaintiff was made a comanager of the company's Minneapolis office, but in December 1967 was demoted to an ordinary salesman. On February 26, 1968, he submitted his resignation. He alleges he was in fact constructively dismissed because of "intolerable and humiliating conditions of employment" imposed on him. This raises the issue of whether he voluntarily left the services of the company within the meaning of the following provision of the retirement plan, thereby forfeiting his retirement benefits:
"In the event that an employee should voluntarily leave the service of the Company or be dismissed for dishonesty, such employee shall not be entitled to receive any paymentno merit in these contentions. The formal rules adopted by the New York Stock Exchange were reduced to writing when they were promulgated. Copies of the rules were available to all brokerage houses and their employees. They were incorporated by reference in plaintiff's application for registration executed in 1957. He undertook to be governed by them. It was incumbent on him to keep apprised of amendments since he could anticipate there would be additions from time to time. There was no obligation on his employer to give him formal notice and nothing in the contract imposed that duty on the employer. Presumably the amendments were equally available to employer and employee.
By the application signed in 1957, plaintiff was pledged to abide by the rules of the New York