; and (iv) may be magnetic or removable in nature. (c) Signage policy Not later than 180 days after the date of enactment of this Act, each transportation network company shall implement a policy to require that any illuminated signage described in section 171(c)(2)(D)(iii) of title 23, United States Code, be returned to the transportation network company when a TNC driver ceases to be employed or contracted by the company. 5. Prohibition on sale of transportation network company signage It shall be unlawful for any person to sell or offer for sale any illuminated sign described in section 171(c)(2)(D)(iii) of title 23, United States Code. 6. Unfair or deceptive act or practice (a) In general A violation of section 4 or section 5 shall be treated as a violation of a rule defining an unfair or deceptive act or practice prescribed under section 18(a)(1)(B) of the Federal Trade Commission Act ( 15 U.S.C. 57a(a)(1)(B) ). (b) Powers of Federal Trade Commission (1) In general The Federal Trade Commission shall enforce sections 4 and 5 in the same manner, by the same means, and with the same jurisdiction, powers, and duties as though all applicable terms and provisions of the Federal Trade Commission Act ( 15 U.S.C. 41 et seq.) were incorporated into and made a part of such sections. (2) Privileges and immunities Any person who violates section 4 or section 5 shall be subject to the penalties and entitled to the privileges and immunities provided in the Federal Trade Commission Act ( 15 U.S.C. 41 et seq.). 7. GAO study on the incidence of assault and abuse of transportation network company passengers and drivers The Comptroller General of the United States shall— (1) conduct a study on the incidence of assault and abuse perpetrated on drivers by passengers using TNC vehicles, and on passengers by drivers of TNC vehicles, including an examination of— (A) incidences in which individuals who are not TNC drivers attempt to pose as TNC drivers