Commencing date of payments
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
(a) A former spouse survivor annuity based on a court order acceptable for processing begins to accrue in accordance with the terms of the court order but no earlier than the later of—
(1) The first day after the date of death of the employee, separated employee, or retiree; or
(2) The first day of the second month after OPM receives a copy of the court order acceptable for processing.
(b) OPM will not authorize payment of the former spouse survivor annuity until it receives an application and supporting documentation required under § 838.721.
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.