CFR›Title 40›Chapter I›Part 135›Subpart B ContainsSections 135.10–135.13CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart B—Prior Notice Under the Safe Drinking Water Act Sections 135.10 § 135.10 Purpose. 135.11 § 135.11 Service of notice. 135.12 § 135.12 Contents of notice. 135.13 § 135.13 Timing of notice. Source54 FR 20771, May 12, 1989, unless otherwise noted. Previous A Subpart A—Prior Notice Under the Clean Water Act