Home › CFR › Title 40 › Part 13540 CFR Part 135 — Prior Notice of Citizen SuitsSubpart A — Prior Notice Under the Clean Water Act§ 135.1— Purpose.§ 135.2— Service of notice.§ 135.3— Contents of notice.§ 135.4— Service of complaint.§ 135.5— Service of proposed consent judgment.Subpart B — Prior Notice Under the Safe Drinking Water Act§ 135.10— Purpose.§ 135.11— Service of notice.§ 135.12— Contents of notice.§ 135.13— Timing of notice.