2. Publishers loss insurance is an undertaking by the Minister on behalf of the Gouvernement du Québec:(a) to purchase from the publisher at the cost price one-third of the issued copies of an insured work, if he has not sold more than two-thirds thereof within the prescribed delay or, if he has sold more, to purchase all unsold copies at the cost price plus twenty-five per cent, without however exceeding the cost price of one-third of the copies;
(b) to pay to the author of an insured work an amount equal to twelve and one-half per cent of the cost price of the copies purchased by the Minister.