Urgent: SAT (special additional Tax) in central sales

Hi, i am from uttar pradesh and doing business across india, im issuing CST invoice to individuals @ 12.5% as im sending goods from kanpur to delhi,bangalore. Now i have got notification that i need to pay 2% SAT (Special Addition Tax) to UP commercial taxes, but as this is a central sales and not state sale we are paying CST and Not VAT so we are not eligible to pay additional SAT. I want to know the clarity of the same and is there any notification regarding the same thanks