Section 7(16)(ii) in The Rajasthan Agricultural Produce Markets (Market Committee Employees) Service Rules, 1975
(ii)In case an employee is appointed to the post in addition to his own duties, if the post is equal or lower post he is holding, he may be allowed special pay not exceeding 10% of his pay if the dual charge is upto 60 days and special pay not exceeding 20% of his pay if the period of dual charges is more than 60 days;