rules

1.

quy tắc

one of a set of explicit or understood regulations or principles governing conduct within a particular activity or sphere.

:
the rules of the game were understood
1.

quy tắc

exercise ultimate power or authority over (an area and its people).

:
the region today is ruled by elected politicians
2.

quy tắc

pronounce authoritatively and legally to be the case.

:
a federal court ruled that he was unfairly dismissed from his job