suggested by the Special Counsel, it would render itself repugnant to Section 26 of the SEZ Act, which exempts a SEZ unit from Excise, Customs, Service Tax and levy of taxes on the sale or purchase of goods if such goods are meant to carry on the authorized operations by a developer or entrepreneur. We may also, in this context, mention Rule 27 of the SEZ Rules which empowers the Development Commissioner, Ministry of Commerce & Industry, Government of India, to certify the contractors and the SEZ unit which are eligible for exemption from payment of various duties and taxes, including VAT. Above all, Section 51 of the SEZ Act gives overriding effect to the SEZ Act over all other laws in India. Therefore, if Section 7-A of the VAT Act is construed as exempting the sales effected by a registered dealer alone to another registered dealer in SEZ, it would render the very provision ineffective. We therefore cannot subscribe to such a construction. We however hasten to add that Section 7-A of the VAT Act read with Entry 59-A of Schedule I of the VAT Act restricts exemption in respect of goods sold to units, operator, Developer, Co-developer and Contractors engaged by them for use in processing area of the respective SEZ except the goods listed in Rule 20(2)(a) of the VAT Rules. As already noticed supra, Section 7 of the VAT Act read with Entry 59 of Schedule I thereof exempts sale of goods to any unit located in a SEZ and it need not be necessarily to those purchasers who find mention in item 59-A of Schedule I. There is no dispute that the first petitioner was given a purchase order for designing, procuring, supplying and erecting pumping equipment for the second petitioner and therefore, the six number of embedded parts which were intercepted by the DCTO stand exempted from the VAT. Section 45 of the VAT Act deals with establishment of check posts and Section 45(3) thereof empowers the Officer in charge of such check post to detain the goods only when tax is not paid on the sale or purchase of goods carried. To