(c)Attestation reports on assessments of compliance with servicing criteria for asset-backed securities required. With respect to each report included pursuant to paragraph (b) of this section, the annual report on Form 10-K must also include a report by a registered public accounting firm that attests to, and reports on, the assessment made by the asserting party. The attestation report on assessment of compliance with servicing criteria for asset-backed securities must be made in accordance with standards for attestation engagements issued or adopted by the Public Company Accounting Oversight Board. Note to § 240.13a-18 . If multiple parties are participating in the servicing function, a separate assessment report and attestation report must be included for each party participating in the servicing function. A party participating in the servicing function means any entity (e.g., master servicer, primary servicers, trustees) that is performing activities that address the criteria in paragraph (d) of Item 1122 of Regulation AB (§ 229.1122(d) of this chapter), unless such entity's activities relate only to 5% or less of the pool assets.