reasonable advance notice of any changes. (v) Security and privacy standards A large communications platform provider shall, consistent with industry best practices, set privacy and security standards for access by competing communications services to the extent reasonably necessary to address a threat to the large communications platform or user data, and shall report any suspected violations of those standards to the Commission. (C) Prohibited changes to interfaces A change to an interoperability interface or terms of use made with the purpose, or substantial effect, of unreasonably denying access or undermining interoperability for competing communications services shall be considered a violation of the duty under subparagraph (A) to facilitate and maintain interoperability based on fair, reasonable, and nondiscriminatory terms. (3) Functional equivalence A large communications platform provider that maintains interoperability between its own large communications platform and other products, services, or affiliated offerings of such provider shall offer a functionally equivalent version of that interface to competing communications services. (4) Interface information (A) In general Not later than 120 days after the date of enactment of this Act, a large communications platform provider shall disclose to competing communications providers complete and accurate documentation describing access to the interoperability interface required under this section. (B) Contents The documentation required under subparagraph (A)— (i) is limited to interface documentation necessary to achieve development and operation of interoperable products and services