Accordingly, the agency is implementing a four-year phase-in period as follows: 10 percent of a vehicle manufacturer's affected vehicles must be equipped with a TPMS that complies with either the four-tire, 25 percent or the one-tire, 30 percent option in the first year (i.e., November 1, 2003 to October 31, 2004); 35 percent in the second year (i.e., November 1, 2004 to October 31, 2005); 65 percent in the third year (i.e., November 1, 2005 to October 31, 2006). After October 31, 2006, 100 percent of a vehicle manufacturer's affected vehicles must be equipped with a TPMS that complies with the requirements set forth in the second part of this final rule. As noted above, the agency will publish the second part of this final rule by March 1, 2005, in order to give manufacturers sufficient lead time.