vested rights

Translations
закрепленные права
The employees have vested rights to their pension benefits.
У сотрудников есть закрепленные права на их пенсионные выплаты.
Definitions
Vested rights refer to legal rights that are guaranteed to an individual or entity, which cannot be taken away without due process. These rights are typically established through law, contract, or other legal means, and they provide a sense of security and entitlement to the holder.