In applying and construing this uniform act, consideration must be given to the need to promote uniformity of the law with respect to its subject matter among states that enact it.

If any provision of this chapter or its application to an individual or circumstance is held invalid, the invalidity does not affect other provisions or applications of this chapter which can be given effect without the invalid provision or application, and to this end the provisions of this chapter are severable.

This chapter takes effect on January 1, 2004. Any determination of parentage or nonparentage made under the law of this State prior to January 1, 2004, remains in force and effect.

A proceeding to adjudicate parentage which was commenced before January 1, 2004, is governed by the law in effect at the time the proceeding was commenced.