(b) This section shall not, however, prevent an owner or other contractor from providing all insurance policies or surety bonds required by such contract without reimbursement from the contractor or subcontractor. Nor shall it preclude such owner or contractor from requiring that the contractor or subcontractor provide a credit in his bid which reflects the amount the bidding contractor or subcontractor would otherwise add if he provided his own insurance as required in the bid specifications. This section shall not deny an owner or contractor the right to approve the form, sufficiency, or manner of execution, of any insurance policies or surety bonds furnished by the insurance company selected by the bidder.