In 1998, the DMCA added rules to the United States Code (17 U.S.C. §: 512) that relinquishes system operators from copyright liability for the purposes of caching.
1998年，DMCA增加了美国法典（17 U.S.C. §: 512）的规定，放弃追究以缓存为目的的系统运营商的版权责任。