Obligation of contracts

OBLIGATION OF CONTRACTS. By this expression, which is used in the constitution of the United States, is meant a legal and not merely a moral duty. 4 Wheat. 107. The obligation of contracts consists in the necessity under which a man finds himself to, do, or to refrain from doing something. This obligation consists generally both in foro legis and in foro conscientice, though it does at times exist in one of these only. It is certainly of the first, that in foro legis, which the framers of the constitution spoke, when they prohibited the passage of any law impairing the obligation of contract. 1 Harr. Lond. Rep. Lo. 161. See Impairing the obligation of contracts.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make any Thing but gold and silver Coin a Tender in Payment of Debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility.
And yet, COA, if you are listening now, should be reasonable and sane enough to know that in the in our Constitution, impairment of the obligation of contracts are not allowed," he said.
The petitioners-Bus Operators Association of the Philippines, the Southern Luzon Bus Operators Association Inc., the Inter City Bus Operators Association, and the City of San Jose del Monte Bus Operators Association-argued that the DOLE order and LTFRB circular violate the constitutional rights of PUB operators to due process of law, equal protection of the law and nonimpairment of obligation of contracts.
According to the Bill of Rights of the 1987 Constitution, no law impairing the obligation of contracts shall be passed.
Constitutional scholars have said the law appears to violate the 14th Amendments Equal Protection Clause, as well as the clause of Article I, Section 10 that prohibits states from passing laws "impairing the obligation of contracts." Gay rights groups, such as Equality Virginia, have suggested that the law could complicate property bequests and interfere with the ability of gay Virginians to designate partners to make medical decisions for them.
The Supreme Court (SC) on September 27, 2018, dismissed the petition of the bus operator groups that questioned the DOLE order, stating that it violated their constitutional rights as public utility bus operators to due process, equal protection, and non-impairment of obligation of contracts.
PASBDI said certain provisions of the IRR were contrary to the Constitution as it denied them due process and even impaired the obligation of contracts. The group said the amendments were contrary to the law.

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