19. Where an accredited bookstore supplies itself with or acquires, from a Québec or Canadian distributor other than an exclusive Québec or Canadian book distributor, books that it may acquire directly from the exclusive distributor, the institution is not obliged to pay more for those books than it would have had to pay if the accredited bookstore had received its supplies from an exclusive Québec or Canadian publisher or his distributor.
R.R.Q., 1981, c. D-8.1, r. 1, s. 19.