definiens: shall mean the index distributed by the Bureau of Labor Statistics for the Consolidated Metropolitan Statistical Area covering San Francisco, Oakland, and San Jose, California, and commonly referred to as " The Bay Area Consumer Price Index . If the Consumer Price Index shall be discontinued, the index published by the Bureau of Labor Statisti cs, United States Department of Labor, entitled shall be substituted in lieu thereof . As condition precedent to CDI 's right to extend the Term, CDI shall deliver written notice of its int ent to exercise such right not less than 60 days prior to the expiration of the initial Term . In the event the Term commences on other than the first day of a month or ends on other than the last day of a month, the Monthly Installments shall be prorated b ased upon the actual number of days of the Term during such month . All terms herein other than the Monthly Installment shall remain the same during the extended Term