The Digital Millennium Copyright Act (DMCA) is a United States copyright law that implements two 1996 treaties of the World Intellectual Property Organization (WIPO). It criminalizes production and dissemination of technology, devices, or services intended to circumvent measures (commonly known as digital rights management or DRM) that control access to copyrighted works. It also criminalizes the act of circumventing an access control, whether or not there is actual infringement of copyright itself. In addition, the DMCA heightens the penalties for copyright infringement on the Internet. Passed on October 12, 1998 by a unanimous vote in the United States Senate and signed into law by President Bill Clinton on October 28, 1998, the DMCA amended Title 17 of the United States Code to extend the reach of copyright, while limiting the liability of the providers of on-line services for copyright infringement by their users."
The Online Copyright Infringement Liability Limitation Act (OCILLA) is United States federal law that creates a conditional safe harbor for online service providers (OSPs, including Internet service providers) and other Internet intermediaries by shielding them for their own acts of direct copyright infringement (when they make unauthorized copies) as well as shielding them from potential secondary liability for the infringing acts of others. OCILLA was passed as a part of the 1998 Digital Millennium Copyright Act (DMCA) and is sometimes referred to as the "Safe Harbor" provision or as "DMCA 512" because it added Section 512 to Title 17 of the United States Code. By exempting Internet intermediaries from copyright infringement liability provided they follow certain rules, OCILLA attempts to strike a balance between the competing interests of copyright owners and digital users.
.....First, the OSP must “adopt and reasonably implement a policy” of addressing and terminating accounts of users who are found to be “repeat infringers.” Second, the OSP must accommodate and not interfere with “standard technical measures.” OSPs may qualify for one or more of the Section 512 safe harbors under § 512(a)-(d), for immunity from copyright liability stemming from: transmitting , caching , storing , or linking  to infringing material. An OSP who complies with the requirements for a given safe harbor is not liable for money damages, but may still be ordered by a court to perform specific actions such as disabling access to infringing material.
Section 512(c) applies to OSPs that store infringing material. In addition to the two general requirements that OSPs comply with standard technical measures and remove repeat infringers, § 512(c) also requires that the OSP: 1) not receive a financial benefit directly attributable to the infringing activity, 2) not be aware of the presence of infringing material or know any facts or circumstances that would make infringing material apparent, and 3) upon receiving notice from copyright owners or their agents, act expeditiously to remove the purported infringing material.