The owner of a bar, club as defined in Regulation .02B of this chapter, restaurant, pub, tavern, retail establishment, theater, concert hall, athletic facility, financial service institution, government building, educational institution, museum, or library shall: Prohibit smoking or vaping in an indoor area open to the public; and Post a sign indicating where smoking or vaping is prohibited as set forth in Regulation .06A of this chapter. An owner of a hotel or motel shall: Prohibit smoking or vaping in an indoor area open to the public except where smoking or vaping is permitted under Regulation .03C of this chapter; and Post a sign indicating where smoking or vaping is permitted or prohibited, as set forth in Regulation .06B and C of this chapter. An owner of a vehicle listed in Regulation .04D of this chapter shall: Prohibit smoking or vaping in the vehicle; and Post a sign indicating where smoking or vaping is prohibited as set forth in Regulation .06D of this chapter. An owner of an establishment containing an indoor area open to the public not listed in Regulation .05A—C of this chapter shall prohibit smoking or vaping in an indoor area open to the public.