(1) Any person signing a funeral service agreement or cremation authorization form or any other authorization for disposition, whether part of a prearranged funeral plan or at time of death, shall be deemed to warrant the truthfulness of any facts set forth therein, including the identity of the deceased whose remains are sought to be buried or cremated and the signer’s authority to order such disposition.
(2)  A funeral establishment, cemetery or crematory establishment shall have the right to rely on such authorization and shall have authority to dispose of human remains upon the receipt of an authorization form signed by the decedent or by the person having the right to control disposition as set forth in section 54-1142, Idaho Code, or upon authorization by the county coroner pursuant to section 31-2802, Idaho Code. There shall be no liability of a funeral establishment, cemetery or crematory establishment that disposes of human remains pursuant to such authorization, or that releases or disposes of the remains pursuant to such authorization.