; or (ii) have a positive impact on the overall level of competition in the markets that will be served as a result of those exemptions. (5) Prohibition (A) In general The Metropolitan Washington Airports Authority may not assess any penalty or similar levy against an individual air carrier solely for obtaining and operating a slot exemption authorized under this subsection. (B) Rule of construction Subparagraph (A) shall not be construed as prohibiting the Metropolitan Washington Airports Authority from assessing and collecting any penalty, fine, or other levy, such as a handling fee or landing fee, that is— (i) authorized by the Metropolitan Washington Airports Regulations; (ii) agreed to in writing by the air carrier; or (iii) charged in the ordinary course of business to an air carrier operating at Ronald Reagan Washington National Airport regardless of whether or not the air carrier obtained a slot exemption authorized under this subsection. . (b) Conforming amendments Section 41718(c)(2)(A) of title 49, United States Code, is amended— (1) in clause (i), by striking and (b) and inserting , (b), and (i)