contracts, consequently, the concomitant power not to enter into a contract with a particular person, does not flow from Article 298, as Article 298 deals with only the authority of the Union of India and the States. The authority of the 2nd respondent to enter into a contract with all the incidental and concomitant powers flow from Section 3 (1) and (2) of the National Highways Authority Act. The nature of the said power is similar to the nature of the power flowing from Article 298 of the Constitution, though it is not identical. The 2nd respondent, being a statutory Corporation, is equally subject to all constitutional limitations, which bind the State in its dealings with the subjects. At the same time, the very authority to enter into contracts conferred under Section 3 of the NHA Act, by necessary implication, confers the authority not to enter into a contract in appropriate cases (blacklist). The „bid document‟ can neither confer powers, which are not conferred by law on the 2nd respondent, nor can it substract the powers, which are conferred by law either by express provision or by necessary implication. The bid document is not a statutory instrument. Therefore, the rules of interpretation, which are applicable to the