When are permits effective?
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Unless otherwise provided in the permit, a permit will be effective on the date on which the permit is approved by us. A permit may be made effective on some past or future date, by agreement, but such a permit may not be granted or approved more than one year prior to the date on which the permit term is to commence.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.