Section 258.6 - Effective and compliance dates(a) This Part is effective as of August 25, 1999.(b) Compliance with the following sections is mandatory as of August 25, 1999: §§ 258.1 , 258.2 , 258.3 , 258.4 , 258.5(a) , 258.5(b) , and 258.6 .(c) Compliance with § 258.5(c) is mandatory as of March 15, 2000.64 FR 46821, Aug. 27, 1999