Approval given after the fact; accepting or consenting to an action retroactively (commonly used in legal, administrative, or corporate contexts).
緊急の場合は事後承諾で対応することがあるが、原則は事前承認が必要だ。
In emergencies, it may be handled with ex-post-facto approval, but in principle prior authorization is required.
部署の予算を超える出費については、事後承諾を上司から得た。
I obtained ex-post approval from my boss for expenses that exceeded the department's budget.