1. (1) Subject to a challenge under subsection (2) of this section, an individual is identified under this chapter as a genetic parent of a child if genetic testing complies with RCW 26.26A.300 through 26.26A.355 and the results of the testing disclose:

   1. (a) The individual has at least a ninety-nine percent probability of parentage, using a prior probability of 0.50, as calculated by using the combined relationship index obtained in the testing; and
   2. (b) A combined relationship index of at least one hundred to one.

2. (2) An individual identified under subsection (1) of this section as a genetic parent of the child may challenge the genetic testing results only by other genetic testing satisfying the requirements of RCW 26.26A.300 through 26.26A.355 which:

   1. (a) Excludes the individual as a genetic parent of the child; or

   2. (b) Identifies another individual as a possible genetic parent of the child other than:

      1. (i) The woman who gave birth to the child; or
      2. (ii) The individual identified under subsection (1) of this section.
3. (3) Except as otherwise provided in RCW 26.26A.350, if more than one individual other than the woman who gave birth is identified by genetic testing as a possible genetic parent of the child, the court shall order each individual to submit to further genetic testing to identify a genetic parent.

[ 2018 c 6 s 406.]