(1) When the individual who gave birth and the individual seeking to establish parentage were married after the birth of the child, the individual seeking to establish parentage shall file an assertion with the department to establish a presumption of parentage consistent with RCW 26.26A.115.

(2) If required to establish a presumption of parentage, the individual shall file an assertion prior to filing a voluntary acknowledgment of parentage with the department.

(3) The assertion may only be filed with the department on the forms provided by the department. The form must be completed and sent to the department along with the applicable fees established in WAC 246-491-990.