10. The toll rate per axle for class B and C road vehicles is the same for all road vehicles in the same class.
Despite the first paragraph, the partner may offer a discount if
(1) it is applicable on the same conditions for all road vehicles in the same class;
(2) it is offered for any or all of the following reasons:
(a) the means by which the toll is collected;
(b) the date on which the account for the transponder is opened;
(c) the number of passages of the road vehicle on the toll infrastructure.