IRRC is required under the Regulatory Review Act to make as part of the public record all comments we receive on any regulation. See 71 P.S. § 754.5a(k). Comments are written statements delivered to IRRC supporting, opposing or recommending changes to a final, proposed or existing regulation which is subject to review by IRRC. 1 Pa. Code § 301.1. We do not redact or omit portions of any comment letters, which must be retained for at least four years after the regulation has been promulgated.