Trip permits for apportionable vehicles, as defined in section 2 of the International Registration Plan Agreement Act of 1997, effective September 5, 1997 (D.C. Law 12-14; D.C. Official Code § 50-1507.01) , shall be valid for a six (6) day period, to begin on a day determined by the Director.
D.C. Mun. Regs. tit. 18, r. 18-434