Indian Contract Act, 1872
Thepawnee may retain the goods pledged, not only for payment of the debt or the performance of the promise, but for the interest of the debt, and all necessary expenses incurred by him in respect of the possession or for the preservation of the goods pledged. 174.Pawnee not to retain for debt or promise other than that for which goods pledged. Presumption in case of subsequent advances.—The pawnee shall not, in the absence of a contract to that effect, retain the goods pledged for any debt or promise other than the debt or promise for which they are pledged; but such contract, in the absence of anything to the contrary, shall be presumed in regard to subsequent advances made by the pawnee.