установленный

установленный

"Established" or "installed."

This sentence uses "установленный" to describe something that is officially defined or set as standard.

Этот пункт прописан в установленном регламенте.

This clause is stated in the established regulation.

Here, "установленный" modifies "срок," indicating that the deadline has been officially determined or agreed upon.

Установленный срок завершения проекта приближается.

The established deadline for project completion is approaching.

In this usage, "установленным" describes standards that are pre-defined or set as goals to achieve.

Новый закон был принят, чтобы привести систему к установленным стандартам.

A new law was adopted to bring the system to established standards.