Not later than June 1, 2010, the State Contracting Standards Board, in consultation with the Attorney General, shall adopt regulations, in accordance with the provisions of chapter 54, specifying the types of contracts that may be used by state contracting agencies. Such regulations shall specify that a cost-reimbursement contract may be used only when a determination is made in writing by the agency procurement officer that such contract is likely to be less costly to the state than any other type or that it is impracticable to obtain the supplies, services or construction required except under such a contract.