(1) A nontaxable transaction certificate executed by a buyer or lessee must be in the possession of the seller or lessor at the time that a nontaxable transaction occurs.
(2) A nontaxable transaction certificate must contain the information and be in the form prescribed by the department.
(3) Only a buyer or lessee who has registered with the department and whose seller's permit is valid may execute a nontaxable transaction certificate.
(4) If the seller or lessor accepts a nontaxable transaction certificate within the required time and believes in good faith that the buyer or lessee will employ the property or service transferred in a nontaxable manner, the properly executed nontaxable transaction certificate is considered conclusive evidence that the sale is nontaxable.