72.6. A public sector body may provide, notwithstanding any provision of any law applicable to it and within the scope of a borrowing plan referred to in section 72.1.1 or a program referred to in section 72.4, that the power to borrow or to conclude the transactions referred to in sections 72.2 and 72.3, or to approve their terms and conditions may be exercised on behalf of the body by not less than two officers authorized by the body.