This is the 17877th most frequent Russian word.
установленными
"Установленными" means "set" or "established" in English.
The word 'установленными' is used as a participle form of the verb 'установить', modifying 'rules' to describe that they are already defined or established by someone or something.
Эти изменения были введены в соответствии с установленными правилами.
These changes were introduced in accordance with the established rules.
Here, 'установленными' functions as an adjective derived from the participle to describe the deadlines that were determined in advance.
Список задач был согласован с установленными сроками.
The task list was agreed upon with the established deadlines.
In this sentence, 'установленными' provides a descriptive attribute to 'parameters', indicating that the parameters have been set or defined beforehand.