Final answer:
The question pertains to the legal principle which may require a minor to restore the original position of an adult party in the event of contract disaffirmation. States cannot enact laws that retroactively impair contract rights as protected by rules against ex post facto laws and bills of attainder.
Step-by-step explanation:
The subject question asks about the legal obligations of a minor who disaffirms a contract and their duty to restore the adult party to their original position before the contract was made. According to the doctrine of contract restoration, when a minor disaffirms a contract, they may be required to return any property or consideration they have received. However, the laws regarding this duty can vary by state. Furthermore, the concept of impairment of the obligation of contracts is constitutionally relevant, as states are prohibited from enacting legislation that retroactively impairs contract rights. These legal principles are rooted in the protections against retroactive liabilities as seen in rules against ex post facto laws and bills of attainder, which ensure fairness in contractual and legal obligations.