The legislative analysis and the ballot arguments readily demonstrate that Proposition 22 was crafted with a prophylactic purpose in mind. It was designed to prevent same-sex couples who could marry validly in other countries or who in the future could marry validly in other states from coming to California and claiming, in reliance on Family Code section 308, that their marriages must be recognized as valid marriages. With the passage of Proposition 22, then, only opposite-sex marriages validly contracted outside this state will be recognized as valid in California.