4. Following the conference, the unit shall issue a certificate of noncompliance unless any of the following applies:
- a. The unit finds a mistake in the identity of the person.
- b. The unit finds a mistake in determining the amount of the liability.
- c. The unit determines the amount of the liability is not greater than one thousand dollars.
- d. The obligor enters into an acceptable payment plan.
- e. Issuance of a certificate of noncompliance is not appropriate under other criteria established in accordance with rules adopted by the department of revenue pursuant to chapter 17A.