Invalid rating. If, following discussions with the manufacturer and a retest where applicable, DOE determines that the verification testing was conducted appropriately in accordance with the DOE test procedure, DOE will issue a determination that the rating for the model is invalid. The manufacturer must elect, within 15 days, one of the following to be completed in a time frame specified by DOE, which is never to exceed 180 days:
(A) Re-rate and re-certify the model based on DOE's test data alone; or
(B) Discontinue the model through the certification process; or
(C) Conduct additional testing and re-rate and re-certify the basic model based on all test data collected, including DOE's test data.