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 any person 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 applies to proceedings begun on or after July 1, 2015, to establish a support order or determine parentage of a child or to register, recognize, enforce, or modify a prior support order, determination, or agreement, whenever issued or entered. Any determination of support or nonsupport made under the law of this State prior to July 1, 2015, remains in force and effect.