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(1) If a concession agreement authorizes the charging of tolls, the following may occur in the manner and to the extent provided by the concession agreement:
(a) tolls may be charged for vehicular use of the concession highway, which tolls may differ in relation to
(i) the class of user of the concession highway or the class of vehicle to which the vehicle using the concession highway belongs,
(ii) the ownership, type, character, size, weight, number of axles or accessories of the vehicle using the concession highway,
(iii) the nature, extent, date or time of that use,
(iv) whether a toll device is detected, or not detected, in or on the vehicle, or whether the vehicle is identified by another method of vehicle information capture,
(v) the time and manner of payment of tolls, and
(vi) any other criteria prescribed by regulation or as provided for in accordance with a concession agreement;
(b) tolls may be set and varied from time to time;
(c) interest and other charges may be charged in relation to tolls that are not paid by their due date.
(2) The rate of interest that may be charged on a toll that is not paid by its due date, and the amount of any other charge related to a toll or its collection, must not exceed
(a) the rate and amount set by the regulations, or
(b) if no rate or amount is set by the regulations, the rate or amount established in accordance with the terms of the concession agreement.