Corrections
Errors are corrected in the page, dated, and recorded here. How to report an error.
Policy
A substantive error — a rule misdescribed, a text miscited, a wrong figure — is corrected in the page as soon as it is established, with a dated note at the foot of the guide, and entered in the record below. A clerical error (spelling, link, formatting) is corrected without a note.
A guide part of which is in question stays online with a warning at the top until the correction is made; it is not withdrawn without explanation.
Reporting an error
Write to us with the page, the passage and, where possible, the text or document that contradicts what we wrote: Contact. We answer every report and say what we did with it.
Record of corrections
No substantive correction has been recorded to date. Future corrections will be listed here with the date, the page and the nature of the correction.