At the formal hearing held by the department to determine whether the driver is a habitual offender, the certified abstract of convictions of traffic offenses or determinations that the indicated traffic infractions occurred shall be prima facie evidence that the person named therein was duly convicted by the court wherein such conviction or holding was made of each offense or infraction shown by such transcript or abstract.

A person may bring a collateral attack on the constitutional validity of the convictions for the traffic offenses giving rise to the proposed license revocation, pursuant to RCW 46.65.020(1): Provided, however, That the person collaterally attacking the constitutional validity of any conviction for a traffic offense must prove by clear, cogent and convincing evidence both of the following:

(1) That the person pleaded guilty to a traffic offense for which imprisonment was authorized without having been advised of his or her right to be represented by counsel and or his or her right to have counsel appointed if indigent; and

(2) As the result of the guilty plea, the driver was sentenced to jail and actually served time in jail.

The department may, in addition, consider any records in its possession with respect to any conviction(s) which is (are) being collaterally attacked.