; or (B) communicates a message relating to any political matter of national importance, including— (i) a candidate; (ii) any election to Federal office; or (iii) a national legislative issue of public importance. (5) Time to maintain file The information required under this subsection shall be made available as soon as possible and shall be retained by the online platform for a period of not less than 4 years. (6) Safe harbor for platforms making best efforts to identify requests which are subject to record maintenance requirements In accordance with rules established by the Commission, if an online platform shows that the platform used best efforts to determine whether or not a request to purchase a qualified political advertisement was subject to the requirements of this subsection, the online platform shall not be considered to be in violation of such requirements. (7) Penalties For penalties for failure by online platforms, and persons requesting to purchase a qualified political advertisement on online platforms, to comply with the requirements of this subsection, see section 309. . (b) Rulemaking Not later than 120 days after the date of the enactment of this Act, the Federal Election Commission shall establish rules— (1) requiring common data formats for the record required to be maintained under section 304(k) of the Federal Election Campaign Act of 1971 (as added by subsection (a)) so that all online platforms submit and maintain data online in a common, machine-readable and publicly accessible format; (2) establishing search interface requirements relating to such record, including searches by candidate name, issue, purchaser, and date