# What metering and calibration rules apply to a CCTS offset project's monitoring plan?

Canonical: https://senseible.earth/answers/ccts-offset-monitoring-plan-meter-rules

Readings that change all the time, such as fuel used or power generated, must be measured continuously. Fixed values like emission factors are updated at least once a year. Meters must meet BIS, national or IEC standards and be calibrated by an NABL accredited lab, and data is kept for two years after the last issuance.

## The requirements in the project standard

- Continuously varying data (fuel inputs, heat or electricity produced, gas captured): measured continuously and recorded at set intervals.
- Generally constant data (emission factors, calorific values, efficiencies): taken from published sources at least once a year, unless the methodology asks for more.
- Measuring equipment certified to BIS, national or IEC standards.
- Calibration by an NABL accredited organisation.
- Uncertain readings cross-checked against other data sources.
- Methods, accuracy, intervals, responsible people and QA/QC procedures written into the plan.

## Record keeping

All monitored data is archived electronically for two years after the crediting period or the last issuance of credits, whichever is later.

## Where invoices help

Fuel supplier invoices and electricity bills are the usual cross-check for meter readings, and BEE's fossil fuel tool prefers calorific values printed by the supplier on the invoice.

## What Senseible does here

Senseible keeps fuel and electricity invoices as dated, fingerprinted monthly records, the consumption data a project's monitoring report and its verifier will ask to trace.

- [BM-T-002 fossil fuel tool](https://senseible.earth/answers/ccts-tool-bm-t-002-fossil-fuel-emissions)
- [Monitoring a BM IN02.001 project](https://senseible.earth/answers/ccts-bm-in02-001-monitoring-records)
- [CCTS monitoring and verification](https://senseible.earth/answers/ccts-monitoring-verification-requirements)

Sources: [BEE, Detailed Procedure for Offset Mechanism under CCTS, Version 1.0 (effective 27 March 2025)](https://beeindia.gov.in/WriteReadData/RTF1984/RTF-PDF-dd26de202535b101_1776055896.pdf)

Last reviewed 2026-10-23. Section B4.9 of the scanned procedure, read on 23 October 2026.