; and (iii) the amount such person budgeted for the purchase of the advertisement on the platform, as well as the amount such person paid for the purchase of the advertisement on the platform. (3) Time to maintain file The information required under this subsection shall be made available as soon as possible and shall be retained by the covered online platform or covered intermediary for a period of not less than 4 years. (4) Safe harbor for platforms and intermediaries making best efforts to identify requests which are subject to record maintenance requirements (A) Availability of safe harbor In accordance with rules established by the Commission, if a covered online platform or covered intermediary shows that the platform or intermediary used best efforts to determine whether or not a request to purchase a qualified political advertisement or a request to purchase an arrangement for the dissemination of a qualified political advertisement (as the case may be) was subject to the requirements of this subsection, the platform or intermediary shall not be considered to be in violation of such requirements. (B) Special rules for disbursement paid with credit card For purposes of subparagraph (A), a covered online platform or a covered intermediary shall be considered to have used best efforts in the case of a purchase of a qualified political advertisement, or a purchase of an arrangement for the dissemination of a qualified political advertisement (as the case may be), which is made with a credit card if— (i) the individual or entity making such purchase is required, at the time of making such purchase, to disclose the credit verification value of such credit card