Summarize the following court judgment. ivil Appeal No. 1350 of 1990. From the Judgment and Order dated 9.2. 1989 of Delhi High Court in C.W. No. 1904 of 1983. Dr. L.M. Singhvi	 Dr. A.M. Singvi and D. Bhandari (N.P.) for the Appellants. Harish N. Salve	 Mrs. P. Shroff and S.A. Shroff for the Respondent. The Judgment of the Court was delivered by SABYASACHI MUKHARJI	 CJ. Having heard counsel for the parties and having considered the facts	 circumstances and the contentions involved herein	 we grant special leave and dispose of the appeal by judgment herein. This appeal arises out of the judgment and order of the High Court of Delhi dated 9th February	 1989. Appellant No. 1 is a partnership firm. The other four appellants are the partners of the said firm. The respondent is a company incorporated under the Indian and hav ing	 inter alia	 one of its regional offices at Janpath	 New Delhi. The appellants sought in the Writ Petition filed under Article 226 of the Constitution before the High Court a writ of mandamus against the respondent directing it to desist from denying or 821 discontinuing the supply of all kinds of lubricants to the appellant No. 1 and from ousting	 black listing	 coercing or pressurising the appellant No. 1 from the business of deal ing with all kinds of lubricants supplied by the respondent company to have and to continue to supply all kinds of lubricants to the appellant firm as was done in the past and for the maintenance of status quo existing on the 27th May	 1953 and for payment of necessary damages for the period from 28th May	 1983 till the date of the filing of the writ petition before the High Court or till the decision of the writ petition. The appellant No. 1	 herein referred to as the firm	 is a partnership firm duly registered with the Registrar of Firms	 Delhi. The said firm had been carrying on the distri bution and sale of all kinds of lubricants and was regis tered under Sales Tax Act vide Registration No. 1636 dated 22nd October	 195 1 and has a goodwill of its own	 according to the said appellants	 in the entire region of Northern India with expertise and knowledge in the distribution and sale of all kinds of lubricants. The appellants contend that in the past 32 years the appellant firm had acquired a very good reputation and has earned enviable goodwill in the trade. As stated hereinbefore	 the respondent company is a statutory body incorporated under the Indian and have been dealing throughout with the appellant firm since 1965 when the firm became	 according to the appellants	 its distributor. The appellants claim that the said firm had been appointed as Lube Distributor and the appellant firm have been given the Permanent Customer Code No. 63 01 3115 1022 9 X	 according to the appellant. The appellants contend that this was done in due course. It is the further case of the appellants that the lubricants were released by the respondent company to the said appellant firm on 25th January	 1965 by Invoice No. 146668 and there after the firm had promoted the sales of the products of the company successfully inasmuch as from February	 1965 to 27th May	 1983 and the firm had received and uplifted the supply of lubricants/goods each year and the total quantity of lubricants/goods such lifted had gone up to the extent of 1	 11	34	854 litres or kgs. The appellants claimed that the said firm is one of the respondent company 's Lube Distribu tor in Northern India. It was the case of the appellants before the High Court and also before this Court that the said firm had been carrying on business as the Lube distrib utor of the respondent company and had been selling all kinds of lubricants. The appellants contend that the re spondent company had recognised the appellant firm during all this period as authorised dealer and a distributor and an agent. 822 It was the case of the appellants before the High Court and they had tried to demonstrate with reference to the various documents	 annexures etc. filed by them that the firm had been always carrying business as Lube Distributor of the Company	 and has been selling all kinds of lubri cants. The appellants further contended that the Company had recognised the firm during all this period as authorised dealer	 distributor and agent. Certain letters were written by the company directing various customers to contact the firm as an authorised Lube Distributor. This contention was stated before the High Court as well as before us. It iS stated that annexures A 2 to A 14 were copies of letters written by the company directing various customers to con tact the firm as an authorised Lube Distributor. Annexure A 15 is an advertisement issued in a specially published souvenir on the occasion of All India Highway Motor Rally held in 1972 sponsored by the Company in which the firm was referred to as the Company 's authorised Lube Distributor. Annexures A 16 to A 35 are copies of the letters written by the Company to the appellants in relation to the dealing of the appellants as Lube Distributor. There are several other documents on which reliance was placed on behalf of the appellants. The firm was treated as authorised dealer and agent of the respondentcompany. It was contended that there was a change of policy by the respondent company	 and cer tain documents of the year 1972 were relied upon to indicate that the supply of lubricants was stopped to those Associa tions and Dealers to whom ad hoc supplies were given	 who were merely re sellers	 traders and who did not have written contracts with the Company. That was the case of the appel lant 's firm. However	 the appellants asserted	 that the supply was continued to the appellant firm being a dealer and distributor of the Company. Reliance was placed on Annexures P 28 to P 34 which are the Product Indent cum Delivery Orders for various periods issued by the Company to the firm. It is stated that in the said Product Indent cumDelivery Order there was a note indicating "For Condi tions of Supply Please Turnover . . ". However	 in the copies filed with the rejoinder affidavit	 there are no terms on the reverse side of the Product Indent cum Delivery Order. Although the firm has been receiving continuous supply of lubricants from the Company	 it was suddenly stopped on 27th May	 1983 by the Company	 and it was con tended that such an action of the Company will have the effect of black listing the firm and is arbitrary and against the principles of natural justice besides being hit by the doctrine of promissory estoppel. The appellant firm	 it was contended	 had made representations against the aforesaid action of the respondent company but to no use. In that background the reliefs mentioned here in before were sought from the High Court 823 in the application filed under article 226 of the Constitu tion. The respondent company had raised various objections to the maintainability of the Writ Petition	 namely	 inter alia	 that the Company was not State within the meaning of Article 12 of the Constitution as the Company is registered under the 	 the Writ Petition was not maintainable as no writ to enforce alleged supply	 according to the respondent company	 was maintainable and the appro priate remedy for the appellants was to claim damages for breach of contract or relief for specific performance of contract	 if any. It was submitted	 further	 that the firm had not any contract and was seeking to rely on an irregular course of conduct and on an ad hoc arrangement which the company cannot perpetuate in view of the prevailing guide lines and/or directions received from the Ministry of Energy in the Department of Petroleum. Where in fact there was an actual written agreement the Company 's contractual relation ship with its distributors was also capable of termination forthwith and was only subject to the normal contractual laws and decisions in the realm of contract could not be the subject matter of proceedings under article 226 of the Constitution	 it was submitted. The appellants case	 it was urged by the responde it company	 was at much lower footing. The Company however deaied that the firm had even been black listed and it had never acted in a mala fide	 or capricious or arbitrary manner or on any extraneous	 or oblique or irrelevant consideration. There was no commit ment	 it was suggested	 to supply a fixed quantity regular ly	 made to the appellant firm at any stage. It appears that the procedure adopted for the supply of lube oil products was that the party requiring supply would write a letter to the Company 'whereupon the Divisional Office through the Lube section would process the same and would intimate as to how much supply was possible. Thereupon the requisition slip would be processed and a delivery challan/order would be made out. The conditions of the Proluct Indent cum Delivery Order	 inter alia	 categorically provided that "IOC also reserves the right to cancel your order without any intimation or assigning any reason". It further provided that "IOC took no responsibility of des patches/releases of stocks shall be on the basis of avail ability of stocks. " There was no other contract in the facts and circumstances of the case	 it was urged. The letters making the requisitions	 the Product Indent cum Delivery Orders	 the Delivery Challans as also the payment are the only documents constituting the dealing or transactions between the parties. The Company had categorically reserved its right to refuse and/or cancel the orders with 824 out any intimation or assigning any reason and it was per fectly within its fight to discontinue the said arrangement. Several obligations have been provided under the arrangement including	 inter alia	 price controls	 minimum off take of stocks	 safeguards against contamination	 fight to the inspection and/or unrestricted access	 right of account etc. It was asserted ' that even under the contractual transaction as entered into with the Associated Trading Company	 the respondent company had fight of termination forthwith for any reason whatsoever and the Company 's fight to terminate was not lettered by the doctrine of reasonableness or doc trine of natural justice and rights of hearing etc. as sought to be put forward on behalf of the appellants. It is	 therefore	 suggested that what was not even contractually recognised should not be artifically given higher status	 in the facts and circumstances of the case	 as the appellants were seeking to invoke the fight flowing from an utter irregularity specially when the company had been made publi cally accountable especially when the Company does not act unless through a written contract as also when only autho rised. It was further the case of the respondent that the company was subjected to distribution policies and guide lines of the Department of Petroleum in the Ministry of Energy	 Government of India. They are also bound by the directives to the effect that lubricants are to be sold only to consumers	 to those parties who will not sell directly or indirectly to foreign oil companies and no sale should take place to old agents or distributor of foreign oil companies. All sales of lubricants must take place to actual consumers or to such small parties who will sell actually to consumers and not to foreign oil company. Besides this	 the Ministry of Energy by the letter beating reference No. P 17011/7/82 SUP dated 21st December	 1982 under policy number 201 had communicated to all oil companies that no new distributor was to be appointed for distribution of lubricating oils and there is a ban on such appointments. In the facts and the circumstances of the case the Company was	 thus	 according to the respondent	 prevented by the directive/instruction/guidelines of the Ministry of Energy to appoint new dealers and distributors or to formalise any agreement constituting the dealership or distributorship. In fact	 right since 1972	 24 parties who had ad hoc arrange ment of supply of lube oils were discontinued	 according to the respondent. There was no assurance	 whatsoever	 nor any promise nor any contract or nor any prescribed schedule to supply any quantity of lubricants	 as alleged	 to the appel lant or to anybody else. It was further asserted in the present case that in view of the ban imposed	 no fresh distributors could be appointed nor the oil companies empow ered to regularise and contract afresh for 825 dealers/distributors in lubricant oils. It was further the case of the respondent that the customer code number is given to authorised distributors/dealers only. The position was explained that the mode and manner of computerisation of accounts set out in Annexure P 25 and the allotment of customer code number is only for the purpose of identifica tion and not for any other purpose nor to designate the firm as an authorised Lube distributor. The Company had denied that the Code 01 was allotted only to dealers/agents as alleged. The Code 01 was applicable to all re sellers	 where a further sale is a necessary concommitment of the first sale. Certain particulars were given how 01 is given and it was stated in the case of four parties the partnership was terminated because of the new policy. The High Court after exhaustively dealing with the rival contentions came to the conclusion that viewed from diverse angles	 the appellants had sought the specific performance of certain alleged contract. It was also held that the said alleged contract was neither precise	 nor definite nor certain nor was capable of being made certain. It was not certain	 in this case	 as to how much goods were required and for how long were these required and at what considera tion	 these were all uncertain and vague	 it was submitted. It was held by the High Court that for a Writ of mandamus the appellants should have a legal right to enforce the performance of alleged duty by the respondent and since no right was shown to exist by the appellants for selling the continuous supply of the lubricants whatsoever indefinitely for future and no corresponding legal duty was imposed on the respondent to supply	 the Writ of mandamus was not maintainable. In those circumstances the Writ Application was dismissed as not maintainable. Aggrieved thereby the appellants have come up to this Court	 as mentioned hereinbefore. We have heard learned counsel Dr. L.M. Singhvi as well as Mr. Salve exhaustively. Further affidavits were filed and documents produced before us. It was sought to be urged by Dr. Singhvi that the respondent was an instrumentality of State and as such the question involved was whether an instrumentality of State can suddenly	 arbitrarily	 unrea sonably	 without any relevant factors and without any notice and determination or proceeding stop supplies of products which	 according to him	 had been supplied more than 1 crore 11 lacs litres/kg of product continuously and uninterrupted ly over a period of more than 18 years. Dr. Singhvi suggest ed that the respondent IOC is an instrumentality of State under Article 12 of the Constitution. From 826 the nature of the business carried on by the appellants	 it was manifest to us that the supply of the lubricants of the type with which the respondent had a monopoly	 could be carried on by the appellants only as the supplier from the reSpondent. That business was not possible otherwise. The respondent had monopoly in that respect. This aspect is important. The respondent firm was supplying from 1965 to 1983 large quantities of lubricant oil and from 1983 onwards till 1989 supplies were continued on the interim order of the High Court of Delhi. Supplies were stopped suddenly on 27th May	 1983. There is no dispute that no intimation was given	 no notice was given	 no query or clarification sought for and there was no adjudication as such. It was held that the appellant firm was not entitled to supply	 the stoppage of supply in May 1983 was	 therefore	 bad. The appellant further contended that the case of the respondent company IOC was never made known or revealed prior to the Counter Affidavit in the High Court of the appellants. The conten tion urged on behalf of the appellants was that this is patent violation of all canons of natural justice	 fair play and reasonableness. It is submitted that natural justice and reasonableness of the procedure are enshrined under Article 14 of the Constitution. 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 Con stitution. Reliance in this connection may be placed on the observations of this Court in M/s Radha Krishna Agarwal & Ors. vs State of Bihar & Ors.	 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. See M/s Radha Krishna Agarwal vs 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 con tract has been entered into	 to call upon the State to account for its actions in its manifold activities by stat ing reasons for such actions. In a situation of this nature certain activities of the respondent company which consti tuted State under Article 12 of the Constitution may be in certain circumstances subject to Article 14 of the Constitu tion in entering or not entering into contracts and must be reasonable and taken 827 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 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 vs State of Tamil Nadu & Anr.	 ; ; Maneka Gandhi vs Union of India & Anr.	 ; ; Ajay Hasia & Ors. vs Khalid Mujib Sehravardi & Ors.	 ; ; R.D. Shetry vs International Airport Authority of India & Ors.	 ; and also Dwarkadas Marlaria and sons vs Board of Trustees of the Port of Bombay; 	 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 non discrimination in the type of the transactions and nature of the dealing as in the present case. The existence of the power of judicial review however depends upon the nature and right involved in the facts and circumstances of the particular case. It is well settled that there can be "malice in law". Existence of such "malice in law" is part of the critical apparatus of a particular action in administrative law. Indeed "malice in law" is part the dimension of the rule of relevance and reason as well as the rule of fair play in action. It was submitted that the respondent had continuously	 uninterruptedly	 consistently and repeatedly dealt with the appellant and recognised the appellant	 and had treated it as a dealer. On that 828 basis the appellants and his family had acted for 19 years. To substantiate these assertions	 certain documents and samples were referred to by the appellants. Our attention was drawn to large number of invoices	 cash memos and to the customer code No. 013115 allotted to the appellant. It was submitted that the prefix 01 applied only to dealers	 dis tributors etc. The defence of the respondent was the absence of written contract which was the standard form and not appointment letters. The appellant contended that the appel lants were selling IOC products without written contract. It was further asserted that the IOC has sought to change its stand and say that it does not deal with person without contract but according to the appellants	 has issued letters of appointment to some of them and these persons	 according to the appellants	 sell lubes. It was submitted that this change of stand was an afterthought. It was further stated that letters	 in some cases	 cannot lead to an exclusion of all others to whom letters of appointment had not been issued. It is submitted that in the fairness IOC could have and should have issued such letter of appointment to appel lant No. 1 also and should have considered the case of the appellant firm. It was submitted that IOC has always treated lube and non lube products on the same basis	 without dis tinction. This distinction which was sought to be urged before us	 it was submitted	 was an after thought and not justified. The appellant contended that the IOC 's purported reliance upon the guidelines	 was not justified. Further more	 the guidelines were not mandatory or binding. These use directory words like "may". More importantly	 these exclude all those who are part of the existing network and apply for fresh appointment of new distributors. The appel lant was part of the existing network and was not to be inducted as a new distributor and the appellant firm falls within the existing network and has always been so treated continuously and uninterruptedly from 1965 to 1983	 it was the case of the appellants. It was contended that the appel lant firm was entitled to relief	 inter alia	 on grounds of promissory estoppels	 unreasonable and arbitrary exclusion	 and discriminatory treatment under Article 14 of the Consti tution. Mr. Salve on behalf of the appellants sought to urge that the appellant firm had never been appointed as a Lube Distributor. There is no letter of intent	 letter of ap pointment	 much less letter at all. Ad hoc supplies of Lube products alone had been made to the appellant from 1965 onwards. The procedure adopted for the supply of lube products was that the appellant would write a letter to the company whereupon the Divisional Office	 Lube Section would process the same. The policy decision in December	 1982 indicated that no new 829 Distributor for Lube products would be appointed and no new products would be distributed either through the existing net work	 of existing Lube Distributors or to authorised dealers of other products such as	 petrol	 SKO	 LDO and HSD. It was submitted that as a result of the policy it was not the appellant alone to whom the supplies were discontinued. There was similar discontinuance of supplies to 24 other parties whose names were given in the counter affidavit. Mr. Salve submitted that in private law field there was no scope for applying the doctrine of arbitrariness or mala fides. The validity of the action of the parties have to be tested	 it was urged on behalf of the respondent	 on the basis of "right" and not "power". A plea of arbitrariness/mala fides as being so gross cannot shift a matter tailing in private law field to public law field. According to Mr. Salve to permit the same would result in anomalous situation that whenever State is involved it would always be public law field	 this would mean all redress against the State would fall in the Writ Jurisdiction and not in suits before Civil Courts. We are of the opinion that in all such cases whether public law or private law rights are involved	 depends upon the facts and circumstances of the case. The dichotomy between rights and remedies cannot be obliterated by any straight jacket formula. It has to be examined in each particular case. Mr. Salve sought to urge that there are certain cases under Article 14 of arbitrary exercise of such "power" and not cases of exercise of a "right" arising either under a contract or under a Statute. We are of the opinion that that would depend upon the factual matrix. Having considered the facts and circumstances of the case and the nature of the contentions and the dealings between the parties and in view of the present state of law	 we are of the opinion that decision of the State/public authority under Article 298 of the Constitution	 is an administrative decision and can be impeached on the ground that the decision is arbitrary or violative of Article 14 of the Constitution of India on any of the grounds available in public law field. It appears to us that in respect of Corpo ration like IOC when without informing the parties con cerned	 as in the case of the appellant firm herein on alleged change of policy and on that basis action to seek to bring to an end the course of transaction over 18 years involving large amounts of money is not fair action	 espe cially in view of the monopolistic nature of the power of the respondent in this field. Therefore	 it is necessary to reiterate that even in the field of public law	 the relevant persons 830 concerned or to be affected	 should be taken into confi dence. Whether and in what circumstances that confidence should be taken into consideration cannot be laid down on any straight jacket basis. It depends on the nature of the fight involved and nature of the power sought to be exer cised in a particular situation. It is true that there is discrimination between power and fight but whether the State or the instrumentality of a State has the right to functign in public field or private field is a matter which	in our opinion	 depends upon the facts and circumstances of the situation	 but such exercise Of power cannot be dealt with by the State or the instrumentality of the State without informing and taking into confidence	 the party whose fights and powers affected or sought to be affected	 into confi dence. In such situations most often people feel aggrieved by exclusion of knowledge if not being taken into confi dence. Such transaction should continue as an administrative decision with the organ of the State. It may be contractual or statutory but in a situation of transaction between the parties for nearly two decades	 such procedure should be followed which will be reasonable	 fair and just	 that is	 the process which normally be accepted to be followed by an organ of the State and that process must be conscious and all those affected should be taken into confidence. Having regard to the nature of the transaction	 we are of the opinion that it would be appropriate to state that in cases where the instrumentality of the state enters the contractual field	 it should be governed by the incidence of the contract. It is true that it may not be necessary to give reasons but	 in our opinion	 in the field of this nature fairness must be there to the parties concerned	 and having regard to the large number or the long period and the nature of the dealings between the parties	 the appellant should have been taken into confidence. Equality and fair ness at least demands this much from an instrumentality of the State dealing with a right of the State not to treat the contract as subsisting. We must	 however	 evolve such proc ess which will work. Therefore	 we direct that the case of the respondent be put to the appellants	 and let the respondent authorities consider afresh the submissions made by the appellant firm	 namely	 that the existing arrangement amounts to a contract by which the distributorship was continued in case of the appellant firm without any formal contract and further that the new policy of the Government introduced in December	 1982 would not cover the appellant firm and as such the 831 appellant should continue. It will be sufficient	 having regard to the nature of the claims	 for the respondent authority to consider this aspect after taking the appellant firm into confidence on this aspect. Nothing further need be stated or required to be done and we give no 'directions as to whether reasons should be recorded or hereinafter should be given. In the facts and circumstances	 it is not neces sary to give oral hearing or record the reasons as such for the decision. The decision should be based on fair play	 equity and consideration by an institution like IOC. It must act fairly. We direct accordingly that the present arrangement to continue until the respondent company gives the considera tion on the lines indicated above and makes the decision. It is not our decision which is important but a decision on the above basis should be arrived at which should be fair	 just and reasonable and consistent with good govern ment which will be arrived at fairly and should be taken after taking the persons concerned whose rights/obligations are affected	 into confidence. Fairness in such action should be perceptible	 if not transparent. The Judgment and the Order of the High Court are	 there fore	 set aside and the direction and order as aforesaid are substituted and the application made to the High Court is disposed of on the aforesaid terms. In the facts and circum stances of the case	 there will be no order as to costs. Y. Lal Appeal al lowed.

The appellant firm had been carrying on the business of distribution and sale of all kinds of lubricants received from the respondent	 a statutory corporation	 since 1965. It is the case of the appellant that it acted as Lube distribu tor of the respondent corporation and that it had been given the Customer No. during the course of business. The appel lant claimed that from Feb. 1965 to 27th May	 1983	 it had received and uplifted the supply of lubricants/goods each year and the total quantity	 of lubricants/goods thus lifted had gone upto the extent of 1	11	34854 litres or kgs. The respondent suddenly stopped the supply of lubricants to the appellant firm on 27.5.1983. The appellant firm made several representations to the respondent against the aforesaid action of the respondent but to no use. The appellant there upon filed a writ petition in the High Court praying for a writ of mandamns directing the respondent to desist from denying or discontinuing the supply of lubricants and there by save the appellant from being ousted from the business; claim for damages from the date the supply was discontinued was also made. Before the High Court	 it was inter alia contended by the appellant that the correspondent that passed between the appellant and respondent and the invoices issued during the long years of business would show that the respondent always treated the appellant as its agent and distributor; sudden stoppage of supply violated the principles of natural jus tice. It therefore sought the specific performance of the alleged contract. The respondent on the other hand ques tioned the maintainability of the petition as according to it the respondent was not 'State ' within the meaning of article 12 of the Constitution. It further averred that there was no concluded contract by the respondent with the appel lant and that the work continued under an adhoc arrangement; that the policies of the respondent were governed by the guidelines/directions issued to it from time to time by the Ministry of 819 Petroleum whereunder it was no longer possible to give further supplies to the appellant firm. After considering the rival contentions advanced by the parties the High Court	 dismissed the writ petition. The appellant has filed this appeal with special leave. Allowing and disposing of the appeal with directions	 this Court	 HELD: Every action of the State or of 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. [826D] The respondent company Indian Oil Corporation is an organ of the 'State ' or an 'instrumentality of the State ' as contemplated under Article 12 of the Constitution. [826F] The State acts in its executive power under Article 298 of the Constitution in entering or not entering in contracts with individual parties. Article 14 of the Constitution would be applicable to those exercises of power. Therefore	 the action of the State organ under Article 14 can be checked. [826F] Rule of reason and rule against arbitrariness and dis crimination	 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 situa tion like as in the instant case. 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 non discrimination in the type of the transactions and nature of the dealing as in the instant case. [827E F] The dichotomy between rights and remedies cannot be obliterated by any straight jacket formule. It has to be examined in each particular case. [829D] Decision of the State/Public authority under Article 298 of the Constitution	 is an administrative decision and can be impeached on the ground that the decision is arbitrary or violative of Article 14 of the 820 Constitution or on any of the grounds available in public law field. It appears to us that in respect of Corporation like Indian Oil Corporation when without informing the parties concerned	 as in the case of the appellant firm on alleged change of policy and on that basis action to seek to bring to an end the course of transaction over 18 years involving large amounts of money is not fair action	 espe cially in view of the monopolistic nature of the power of the respondent in this field. [829F G] E.P. Royappa vs State of Tamil Nadu and Anr. 	 ; ; Maneka Gandhi vs Union of India and Anr.	 [1978] 1 SCC 248; Ajay Nasia and Ors. vs Khalid Mujib Sehravardi and Ors.	 ; ; A.D. Shetty vs International Airport Authority of India and Ors.	 ; and Dwarkadas Mariatia and Ors. vs Board of Trustees of the Port of Bom bay; 	 	 referred to.