Section 37A(xvii) in The Rajasthan Minor Mineral Concession Rules, 1986
(xvii)The Contractor shall pay the installment of contract money according to the stipulations laid down in the contract and if any amount is not paid on due date it shall be collected as an arrears of land revenue and an interest @ 15% shall be charged from due date irrespective of any other action being taken for cancellation of contract or imposition of penalty under relevant rules.