loophole
noun [ C ]
LAW uk/ˈluːphəʊl/ usa failure to include something in an agreement or law, which allows someone to do something illegal or to avoid doing something:
They plan to close a loophole that allows businesses to avoid paying off redundant workers.
a corporate/legal/tax loophole He has pledged to close a tax loophole that has allowed US firms to take business and jobs abroad.
a loophole in sth Determined landlords found it easy to exploit loopholes in the law.