Does the Attorney General need to look to opposition campaign literature to infer an intent to include brass plumbing fixtures?

6 The Attorney General asks that we look to the opposition campaign literature to infer an intent to include brass plumbing fixtures. (Citing AFL-CIO v. Deukmejian, supra, 212 Cal.App.3d at p. 437, fn. 4.) While courts have occasionally looked to such material, we believe courts should be cautious of doing so because reliance thereon could encourage misleading interpretations being advanced in campaign literature designed to skew future interpretation. In any event, there is no need to do so in this case because "the Act and the ballot arguments provide the dispositive interpretive information." (Ibid.)