; and (B) engages in market activities relating to digital assets. 3. Advertising by digital asset intermediaries (a) Approval by officer Before a digital asset intermediary may make a covered advertisement available to the public, an officer of the digital asset intermediary shall be required to approve that covered advertisement and certify compliance with the requirements of this section. (b) Procedures (1) In general Each digital asset intermediary shall establish written procedures, which are appropriate and reasonable to the business, size, structure, and customers of the digital asset intermediary, for the review of covered advertisements, as required under subsection (a), which shall include— (A) provisions for the education and training of applicable employees of the digital asset intermediary regarding the procedures of the digital asset intermediary governing covered advertisements; (B) documentation of the education and training required under subparagraph (A); and (C) surveillance and follow-up measures to ensure that the digital asset intermediary implements and adheres to those procedures. (2) Recordkeeping (A) Period of maintenance Each digital asset intermediary shall maintain the records required under this subsection for not less than 5 years. (B) Types of records The types of records that a digital asset intermediary is required to maintain under subparagraph (A) include, with respect to each covered advertisement made by the digital asset intermediary— (i) a copy of the covered advertisement; (ii) the dates of the first and, if applicable, last use of the covered advertisement; (iii) the name of the officer of the digital asset intermediary who approved the covered advertisement, as required under subsection (a), including the date on which the officer gave that approval; (iv) information concerning the source of all data, statistical tables, charts, graphs, or other illustrations or outside sources used in the covered advertisement