guarantee, article I, section 3, and the due process guarantees, article I, section 13, and article I, section 19, of the Texas Constitution.
While it is true that state constitutional protections cannot subtract from those rights guaranteed by the United States Constitution, there certainly is no prohibition against a state providing additional rights for its citizens. See, e.g., PruneYard Shopping Center v. Robins, 447 U.S. 74, 100 S.Ct. 2035, 64 L.Ed.2d 741 (1980). Because we are of the opinion that the Texas Constitution, article I, section 13, does accord Texas citizens additional rights, we choose not to decide this case on the basis of the United States Constitution or the equal protection provision of the Texas Constitution.
What remains for our determination is whether article 5.82, section 4, is violative of article I, section 13, of the Texas Constitution. The court of appeals’ opinion concluded that article I, section 13, “was not raised as a ground of defense to the motion for summary judgment and cannot be considered.” 636 S.W.2d at 465. We disagree. The Saxes’ response to Dr. Votteler’s motion for summary judgment states as follows:
Defendant relies upon section 4 of art. 5.82 of the Insurance Code of the State of Texas. Plaintiffs say that if that particular section does apply to this cause of action that said law is unconstitutional since it provides a shorter statute of limitations for minor medical malpractice plaintiffs than other minor plaintiffs and thus violates the equal protection and due process provisions of the United States and Texas Constitutions.
The Texas Constitution contains two separate due process provisions. Article I, section 19, is the traditional due process guarantee, which states: “No citizen of this state shall be deprived of life, liberty, property, privileges or immunities, or in any manner disfranchised, except by the due course of the law of the land.” Article I, section 13, provides: “Excessive bail shall not be required, nor excessive fines imposed, nor cruel or unusual punishment inflicted. All courts shall be open, and every person for an injury done him, in his lands, goods, person or reputation, shall have remedy by due course of law.” While it is true that this provision is sometimes referred to as the “Open Courts Provision,” it is, quite plainly, a due process guarantee. See Hanks v. City of Port Arthur, 121 Tex. 202, 48 S.W.2d 944, 945 (1932); 1 Braden, The Constitution of the State of Texas: An Annotated and Comparative Analysis 50 (1977). Both provisions of the Texas Constitution have their origin in Magna Carta. See Tex. Const, art. I, §§ 13, 19, comment. In any event, the language in the Saxes’ response is sufficient to preserve for review all allegations of unconstitutionality under the due process clauses of the Texas Constitution, and more particularly, article I, section 13. See generally The City of Houston v. Clear Creek Basin Authority, 589 S.W.2d 671 (Tex.1979).
We recognize that “[i]n passing upon the constitutionality of a statute, we begin with a presumption of validity. It is to be presumed that the Legislature has not acted unreasonably or arbitrarily; and a mere difference of opinion, where reasonable minds could differ, is not a sufficient basis for striking down legislation as arbitrary or unreasonable.” Smith v. Davis, 426 S.W.2d 827, 831 (Tex.1968).
Legislative action, however, is not without bounds. As early as 1932, this Court recognized that article I, section 13, of the Texas Constitution ensures that Texas citizens bringing common law causes of action will not unreasonably be denied access to the courts. Hanks v. City of Port Arthur, supra. In Hanks, this Court was confronted with an ordinance that exempted Port Arthur from liability for injuries caused by defective streets unless the city had received notice of the defect twenty-four hours prior to the accident. The ordinance was challenged as being violative of article I, section 13. In holding that the ordinance was unconstitutional, this Court reasoned: