This is the 960th most frequent Chinese word.
規定
Rule; regulation; stipulation.
Here, "規定" means "require or stipulate," indicating an enforced rule or regulation.
校規規定學生必須穿校服。
School rules require students to wear uniforms.
In this case, "規定" refers to the regulation or rule being mentioned.
這項規定對所有員工都適用。
This regulation applies to all employees.
Here, "規定" is used as a verb meaning "to specify or set."