CONTROLLED FINANCIAL CONFIGURATION
Tariff & Prepaid Rules Administration
Encrypted in transit & at rest
Immutable double-entry ledger
OAuth/OIDC · MFA · RBAC
Signed webhooks · Rate limited APIs
Residential Prepaid Tariff
Versioned configuration · no direct production edits
| Consumption block | Monthly volume | Rate | Fixed charge | Tax / fee |
|---|---|---|---|---|
| Block 1 | 0–3,000 gal | B$0.012 / gal | Not applicable | None configured |
| Block 2 | 3,001–6,000 gal | B$0.017 / gal | Not applicable | None configured |
| Block 3 | Above 6,000 gal | B$0.023 / gal | Not applicable | None configured |
VERSION
4.3CREATED BY
Devon BainREVIEWED BY
PendingAPPROVED BY
PendingEFFECTIVE DATE
01 Oct 2026CHANGE REASON
Annual rate review · demoApproval trail
Maker-checker separation enforced
Version 4.3 created
Devon Bain · System Administrator · 12 Sep
Prepaid rules
Residential prepaid · version 3.8
Low balance alertB$5.00
Critical balanceB$1.00
Emergency creditDisabled
Grace rule24 hours · approved cases
Notification cadenceDaily below threshold
Debt recovery allocation10% of top up
Service-policy workflowReview required
Usage rating frequencyDaily
Assistance credit handling
Account-bound · separately reportable
B$20.00 Household Water AssistancePending approval
Credit cannot be withdrawn as cash. Posts as a distinct assistance ledger class after second-user approval.
Maker: Programme Officer
Checker: Finance Approver