Final answer:
The DMCA is the regulation requiring CSPs to comply with copyright law for hosted content, providing legal protection for authors and outlining a notice-and-takedown procedure for copyright infringement claims.
Step-by-step explanation:
The regulation that requires a Content Service Provider (CSP) to comply with copyright law for hosted content is the DMCA, which stands for the Digital Millennium Copyright Act. This U.S. legislation aims to address the balance of copyright interests for individuals and content creators, offering legal protection against the unauthorized reproduction, display, or performance of copyrighted works. The act provides a framework for CSPs to respond appropriately to claims of infringement, often through a notice-and-takedown procedure, ensuring that original works of authorship, such as books and music, are not exploited commercially without the permission of the copyright holder.
The DMCA is particularly important as it also offers a safe harbor provision for online service providers if they adhere to specific requirements laid out in the legislation, which can exempt them from direct liability in certain circumstances. Adherence to this regulation is essential for CSPs, as non-compliance can lead to legal consequences and infringe upon the economic rights of copyright owners.