Below are the operating rules and regulations set forth by the California Public Utilities Commission.
| Territory served by the utility | Preliminary Statement A |
| Types and classes of service, procedure to obtain service, and symbols | Preliminary Statement B-D |
| Water Revenue Adjustment Mechanism/Modified Cost Balancing Account (WRAM/MCBA) | Preliminary Statement M |
| Water Cost of Capital Adjustment Mechanism (WCCM) | Preliminary Statement S |
| Lucerne Balancing Account (LBA) | Preliminary Statement T |
| TCP Litigation Memorandum Account (TCPLMA) | Preliminary Statement W |
| Conservation Expense One-Way Balancing Account 4 (CEBA4) | Preliminary Statement Z4 |
| Conservation Expense One-Way Balancing Account (CEBA5) | Preliminary Statement Z5 |
| Pension Cost Balancing Account (PCBA4) | Preliminary Statement AA4 |
| Pension Cost Balancing Account (PCBA5) | Preliminary Statement AA5 |
| Health Cost Balancing Account 4 (HCBA4) | Preliminary Statement AB4 |
| Health Cost Balancing Account (HCBA5) | Preliminary Statement AB5 |
| Catastrophic Event Memorandum Account (CEMA) | Preliminary Statement AG |
| Chromium 6 Memorandum Account (CHROMIUM-6 MA) | Preliminary Statement AI |
| Customer Assistance Program Balancing Account (CAP BA) | Preliminary Statement AJ |
| Drought Memorandum Account 2 (DRMA2) | Preliminary Statement AL2 |
| Rate Support Fund Balancing Account (RSF BA) | Preliminary Statement AM |
| Infrastructure Memorandum Account (IMA) | Preliminary Statement AN |
| Water Contamination Litigation Memorandum Account (WCLMA) | Preliminary Statement AO |
| General District Balancing Accounts (District BAs) | Preliminary Statement AP |
| Asbestos Litigation Memorandum Account (ALMA) | Preliminary Statement AS |
| Sites Reservoir Memo Account (SITES MA) | Preliminary Statement AU |
| Lead Service Line Memorandum Account (LSL MA) | Preliminary Statement AX |
| Public Safety Power Shut-Off Memorandum Account (PSPS MA) | Preliminary Statement AY |
| 2018 GRC Interim Rate Memorandum Account (2018 IRMA) | Preliminary Statement AZ |
| Polyfluoroalkyl Substances (PFAS) Memorandum Account | Preliminary Statement BA |
| Drought Response Memo Account (DREMA) | Preliminary Statement BC |
| 2021 GRC Interim Rate Memorandum Account (2021 IRMA) | Preliminary Statement BD |
| Lead and Copper Rule Memorandum Account (LCMA) | Preliminary Statement BE |
| Drinking Water Fees Balancing Account (DWFBA) | Preliminary Statement BF |
| Monterey-Style Water Revenue Adjustment Mechanism Balancing Account (M-WRAM) | Preliminary Statement BG |
| Purchased Water Incremental Cost Balancing Account (ICBA) | Preliminary Statement BH |
| Pump Tax Incremental Cost Balancing Account (ICBA) | Preliminary Statement BI |
| Purchased Power Incremental Cost Balancing Account (ICBA) | Preliminary Statement BJ |
| Conservation Regulation Memorandum Account (CRMA) | Preliminary Statement BK |
| Palos Verdes Pipeline Memorandum Account (PVPMA) | Preliminary Statement BM |
| 2021 GRC Capital One-Way Balancing Account (21GRC COBA) | Preliminary Statement BN |
