one-subject rule

The purpose is to prevent the inclusion of incongruous and unrelated matters in the same measure and to guard against inadvertence, stealth and fraud in legislation. Courts strictly enforce such provisions in cases that fall within the reasons on which they rest. But the courts disregard mere verbal inaccuracies, resolve doubts in favor of validity, and hold that, in order to warrant the setting aside of enactments for failure to comply with the rule, the violation must be substantial and plain.