In analyzing the constitutional challenges presently before us, we first explain that the provision added to the California Constitution by Proposition 8, when considered in light of the majority opinion in the Marriage Cases, supra, 43 Cal.4th 757 (which preceded the adoption of Proposition 8), properly must be understood as having a considerably narrower scope and more limited effect than suggested by petitioners in the cases before us. Contrary to petitioners’ assertion, Proposition 8 does not entirely repeal or abrogate the aspect of a same-sex couple’s state constitutional right of privacy and due process that was analyzed in the majority opinion in the Marriage Cases — that is, the constitutional right of same-sex couples to “choose one’s life partner and enter with that person into a committed, officially recognized, and protected family relationship that enjoys all of the constitutionally based incidents of marriage” (Marriage Cases, supra, 43 Cal.4th at p. 829). Nor does Proposition 8 fundamentally alter the meaning and substance of state constitutional equal protection principles as articulated in that opinion. Instead, the measure carves out a narrow and limited exception to these state constitutional rights, reserving the official designation of the term “marriage” for the union of opposite-sex couples as a matter of state constitutional law, but leaving undisturbed all of the other extremely significant substantive aspects of a same-sex couple’s state constitutional right to establish an officially recognized and protected family relationship and the guarantee of equal protection of the laws.