Judgment

SINHA, C.J.I. : This appeal, by special leave, is directed against the judgment and order of the High Court of Patna dated July 13, 1956, disposing of a reference under S. 25(1) of the Bihar Sales Act. 1947, which hereinafter will be referred to as the Act, made by the Board of Revenue, Bihar.

2. The facts of this case have never been in dispute and may shortly be stated as follows. The appellant is a Corporation incorporated under the Damodar Valley Corporation (Act XIV of 1948) and will hereinafter be referred to as the Corporation. It is a multipurpose Corporation, one of its objects being the construction of a number of dams in Bihar and Bengal with a view to controlling floods and utilising the stored water for purposes of generation of electricity. One of such dams is the Konar Dam in the district of Hazaribagh in Bihar. For the construction of the aforesaid Dam the Corporation entered into an agreement with M/s. Hind Construction Ltd., and M/s. Patel Engineering Co., Ltd., on May 24, 1950 and appointed them contractors for the aforesaid purpose. They will hereinafter be referred to as the Contractors. As a result of a change in the design of the Dam, it became necessary to enter into a supplementary agreement and on March 10, 1951, cl. 8 of Part II of the original agreement was amended and a fresh cl. 8 was substituted. Under the new cl. 8 of the agreement, as amended, the Corporation agreed to make available to the contractors such equipment as was necessary and suitable for the construction aforesaid. The Contractors are charged the actual price paid by the Corporation for the equipment and machinery thus made available, inclusive of freight and customs duty, if any, as also the cost of transport, but excluding sales tax. The equipment thus supplied by the Corporation to the Contractors was classified into two groups. Group A and Group B, as detailed in Sch. No 2. The machinery in Group A was to be taken over from the Contractors by the Corporation after the completion of the work at their residual value, which was to be calculated in the manner set out in the agreement. The machinery in Group B was to become the property of the Contractors after its full price had been paid by them. No more need be said about the machinery in Group B, because there is no dispute about that group, the Contractors having accepted the position that Group B machinery had been sold to them. The controversy now remaining between the parties relates to the machinery in Group A.

3. On August 12, 1952, the Superintendent of Sales Tax, Hazaribagh, assessed the Corporation under S. 13(5) of the Act for the period April 1950 to March 1952. It is not necessary to set out the details of the tax demand, because the amount is not in controversy. What was contended before the authorities below and in this Court was that the transaction in question did not amount to a sale within the meaning of the Act. The Superintendent rejected the contention raised on behalf of the Corporation that it was not liable to pay the tax in respect of the machinery supplied to the Contractors. The Corporation went up in appeal to the Deputy Commissioner of Sales Tax against the said order of assessment. By his order dated May 5, 1953, the Deputy Commissioner rejected the contention of the appellant as to its liability under the Act, but made certain amendments in the assessment, which are not material to the points in controversy before us. The Deputy Commissioner repelling the Corporation s contentions based on the Act, held inter alia that the supply of equipment in Group A of the agreement aforesaid amounted to a sale and was not a hire; that the condition in the agreement for the taking over of the equipment on conditions laid down in the agreement was in its essence a condition of re-purchase and that the Corporation was a dealer within the meaning of the Act. The Corporation moved the Board of Revenue, Bihar, in its revisional jurisdiction under section