4. Directors are authorized to sign, for their sectors of activity,(1) services contracts entered into with natural persons, except those related to information technologies;
(2) calls for tenders and contracts for professional services, except those related to information technologies, for less than $50,000;
(3) calls for tenders and contracts for auxiliary services, except those related to information technologies, for less than $50,000;
(4) supply contracts (calls for tenders, local orders, requisitions for goods and delivery), except those related to information technologies, for less than $50,000;
(5) contracts for the leasing or chartering of equipment, vehicles or aircraft, for less than $5,000; and
(6) contracts for the repair of machinery or equipment, except those related to information technologies, for less than $50,000.