This assignment and authorization shall become effective as of the date it is received by the COMPANY and shall be irrevocable for the period of one year or until the termination of the current collective bargaining agreement between the COMPANY and the UNION, whichever occurs earlier; and this assignment and authorization shall be automatically renewed and shall be irrevocable for successive periods of one year each or for the period of each succeeding applicable collective bargaining agreement between the COMPANY and the UNION, whichever shall be the shorter, unless written notice is given by me, by registered US Mail, to the COMPANY and UNION during the ten day period immediately prior to the expiration of each period of one year, or during the 60 day period immediately prior to the expiration of each applicable collective bargaining agreement, whichever occurs earlier. If is understood, however, that this agreement shall continue in force under its terms only so long as I perform work falling under the jurisdiction of the above UNION.