5. An associate deputy minister or an assistant deputy minister is authorized to sign, for his or her sector of activities, any deed, document or writing regardless of the amount involved, except the following documents:
(1) a contract for services, other than legal services, the amount of which exceeds $15 000 000;
(2) a supply contract the amount of which exceeds $25 000 000;
(3) a construction contract the amount of which exceeds $25 000 000.