Because there is a water shortage happening there. They needed to conserve water and be supplied from sources. Right now there are strict measures in the use of water around that area to ensure that it does not go to waste.
<span>(2) create a system of legal segregation</span>
Wong-Woo was eventually allowed to enter because the Secretary of Labor overruled the denial. This suggests that Wong-Woo had a valid application for coming to the U.S.