Collection Period means, with respect to any Payment Date, the period commencing on the first day of the calendar month immediately preceding the month in which such Payment Date occurs (and, in the case of the first Collection Period, the period from (but excluding) the Cutoff Date) and ending on the last day of the calendar month immediately preceding the month in which such Payment Date occurs.
Tank vehicle means a commercial motor vehicle that is designed to transport any liquid or gaseous materials within a tank or tanks having an individual rated capacity of more than one hundred nineteen gallons and an aggregate rated capacity of one thousand gallons or more that is either permanently or temporarily attached to the vehicle or chassis. A commercial motor vehicle transporting an empty storage container tank not designed for transportation with a rated capacity of one thousand gallons or more that is temporarily attached to a flatbed trailer is not considered a tank vehicle.