2. The volume of timber which, pursuant to the second paragraph of section 92 of the Sustainable Forest Development Act (chapter A-18.1), may be sent to a guarantee holder’s plant from other plants operating under a timber supply guarantee may not exceed, during a given year, 10% of the annual volumes of timber specified in the holder’s guarantee, to which any other volume equal to the volumes sent by the guarantee holder to other wood processing plants pursuant to the first paragraph of section 92 may also be added, pursuant to the second paragraph of section 92.