Notwithstanding any other provision of law and except as provided under section 516 (relating to emergency procurement), a purchasing agency may not contract with a company to acquire or dispose of supplies, services or construction that exceed the applicable small purchase threshold unless the company certifies that: (1) the company is not currently engaged in a boycott of a person or an entity based in or doing business with a jurisdiction which the Commonwealth is not prohibited by Congressional statute from engaging in trade or commerce; and (2) the company will not during the duration of the contract engage in a boycott of a person or an entity based in or doing business with a jurisdiction where the Commonwealth is not prohibited by Congressional statute from engaging in trade or commerce.