Colorado
How Calder v. Bull applies in Colorado: state-specific rules, key cases, and bar exam notes for Constitutional Law.
In Colorado, the principles established in Calder v. Bull regarding the prohibition against ex post facto laws are reflected in both state constitutional provisions and statutory law. The Colorado Constitution expressly forbids the enactment of ex post facto laws under Article II, Section 11, ensuring that laws cannot retroactively affect the rights of individuals.
In Colorado, a law is considered ex post facto if it retroactively increases the punishment or criminalizes conduct that was legal at the time it was committed.
The Colorado Supreme Court held that a law imposing harsher penalties for future offenses could not be interpreted to apply retroactively to acts committed prior to the law's enactment.
The court found that retroactive application of a statute violated the ex post facto clause as it altered the punishment for past actions.
The court ruled against the enforcement of an ordinance that retroactively affected property rights, reaffirming the constitutional protection against ex post facto laws.
Colorado's approach closely mirrors the federal standard articulated in Calder v. Bull, as both prohibit retroactive laws affecting criminal punishment. However, Colorado's specific constitutional text emphasizes individual rights, which may provide a more robust protection compared to federal standards.
Ex post facto law principles from Calder v. Bull are frequently tested on the Colorado bar exam, particularly within the context of criminal law and constitutional law.