No provider agency or any other agency, or donor or donors, or method or act thereof that complies with this part shall be deemed a conspiracy or combination in restraint of trade or an illegal monopoly, or an attempt to lessen competition or fix prices arbitrarily, or the creation of a combination or pool, or to accomplish any improper or illegal purpose. Any cooperation or agreement established pursuant to rule shall not be considered as illegal, in restraint of trade, or as part of a conspiracy or combination to accomplish an illegal purpose or act.
HRS § 346-372