Leave from former leave systems
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
An employee who earned leave under the leave acts of 1936 or any other leave system merged under subchapter I of chapter 63 of title 5, United States Code, is entitled to a recredit of that leave under that subchapter if he would have been entitled to recredit for it on reentering the leave system under which it was earned. However, this section does not revive leave already forfeited.
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.