3. The vice-presidents are authorized to sign the following documents, for their vice-presidency, up to the amount specified:(1) supply contracts, supply contracts for resale and contracts for the purchase or rental of immovables for less than $100,000;
(2) construction contracts for less than $100,000 and orders for changes to construction contracts up to an amount of 10% of the initial value of the contract or up to an amount of orders for changes for $100,000, whichever amount is greater, but for less than $50,000 per order for change;
(3) professional services contracts and services contracts of a technical nature for less than $100,000;
(4) contracts for concessions where the annual sales figures are less than $100,000;
(5) contracts for the alienation of assets for less than $25,000.