Accountability
Corrections log
Factual corrections and formula changes are recorded here. The log is intentionally short: the site does not publish time-sensitive prices or regulations until they can be verified and maintained.
| Date | Page | Change | Basis |
|---|---|---|---|
| Initial release | Initial calculator suite published. Formulas and constants documented; automated tests added. No external market prices, vignette prices, tolls or tax rates are published in this build. | Internal formula verification; NIST and EPA references linked on the methodology page. |
How to report a correction
- Include the page URL and the exact figure or statement.
- Explain what you believe is wrong and what the correct version is.
- Link the official source and, for a changing rule, its effective date.
- Do not send sensitive personal information.
Use the contact page. If a correction is accepted, the page and this log will be updated. If a source cannot be verified, the claim will be removed or marked unverified rather than presented as fact.
What is not logged here
Typos, layout changes and internal refactors that do not change a result are not necessarily logged. A change to a formula, constant, source interpretation, unit label or published factual statement is logged.
Page last reviewed: . Formulas are covered by automated tests. Prices are inputs, not live data.