(a) This chapter applies to determinations of parentage in this State.
(b) The court shall apply the law of this State to adjudicate the parent-child relationship. The applicable law does not depend on:
(1) The place of birth of the child; or
(2) The past or present residence of the child.
(c) This chapter does not create, enlarge, or diminish parental rights or duties under other law of this State.
(d) This chapter authorizes an agreement between a woman and another person, an unmarried couple, or a married couple in which the woman relinquishes all rights as a parent of a child conceived by means of assisted reproduction, and which provides that the person or married or unmarried couple become the parents of the child. If a birth results under such an agreement and the agreement is unenforceable under the law of this State, the parent-child relationship is determined as provided in subchapter II of this chapter.