"It is well settled that every action of the State or an instrumentality of the State in exercise of its executive power, must be informed by reason. In appropriate cases, actions uninformed by reason may be questioned as arbitrary in proceedings under Article 226 or Article 32 of the Constitution. Reliance in this connection may be placed on the observations of this Court in M/s Radha Krishna Agarwal & Ors. v. State of Bihar & Ors., [1977] 3 SCC 457.1t appears to us, at the outset, that in the facts and circumstances of the case, the respondent-company IOC is an organ of the State or an instrumentality of the State as contemplated under Article 12 of the Constitution. The State acts in its executive power under Article 298 of the Constitution in entering or not entering in contracts with individual par- ties. Article 14 of the Constitution would be applicable to those exercises of power. Therefore, the action of State organ under Article 14 can be checked. M/s Radha Krishna Agarwal v. State of Bihar, (supra) at p. 462, but Article 14 of the Constitution cannot and has not been construed as a charter for judicial review of State action after the contract has been entered into, to call upon the State to account for its actions in its manifold activities by stating reasons for such actions. In a situation of this nature certain activities of the respondent company which constituted State under Article 12 of the Constitution may be in certain circumstances subject to Article 14 of the Constitution in entering or not entering into contracts and must be reasonable and taken only upon lawful and relevant consideration, it depends upon facts and circumstances of a particular transaction whether heating is necessary and reasons have to be stated. In case any right conferred on the citizens which is sought to be interfered, such action is subject to Article 14 of the Constitution, and must be reasonable and can be taken only upon lawful and relevant grounds of public interest. Where there is arbitrariness in State action of this type of entering or not entering into contracts, Article 14 springs up and judicial review strikes such an action down. Every action of the(1975) 1 SCC 70. State executive authority must be subject to rule of law and must be informed by reason. So, whatever be the activity of the public authority, in such monopoly or semi-monopoly dealings, it should meet the test of Article 14 of the Constitution. If a Governmental action even in the matters of entering or not entering into contracts, fails to satisfy the test of reasonableness, the same would be unrea- sonable. In this connection reference may be made to E.P. Royappa v. State of Tamil Nadu & Anr., [1974] 4 SCC 3; Maneka Gandhi v. Union of India & Anr., [1976] 1 SCC 248; Ajay Hasia & Ors. v. Khalid Mujib Sehravardi & Ors., [1981] 1 SCC 722; R.D. Shetry v. International Airport Authority of India & Ors., [1979] 3 SCC 1 and also Dwarkadas Marlaria and sons v. Board of Trustees of the Port of Bombay, [1989] 3 SCC 293. It appears to us that rule of reason and rule against arbitrariness and discrimination, rules of fair play and natural justice are part of the rule of law applicable in situation or action by State instrumentality in dealing with citizens in a situation like the present one. Even though the rights of the citizens are in the nature of contractual rights, the manner, the method and motive of a decision of entering or not entering into a contract, are subject to judicial review on the touchstone of relevance and reasonableness, fair play, natural justice, equality and nondiscrimination in the type of the transactions and nature of the dealing as in the present case."