'Required' in the Bible

Their relatives who lived in their villages were required to visit every seven days to be with them in turn,

Some were responsible for the service utensils, and they were required to take an inventory of them when they were brought in and out.

So he left there before the ark of the covenant of the LORD Asaph and his brethren, to minister before the ark continually, as every day's work required:

and with the showbread, and the fine flour for a grain offering, and unleavened wafers, or what is baked in the pan or what is well-mixed, and all measures of volume and size [as the Law of Moses required].

whenever burnt offerings are presented to the LORD, whether on Sabbaths, New Moons, or scheduled festivals, regularly in the LORD's presence in accordance with the number required to conduct their service.