"States are facing difficult, volatile times' Centre asked for details on aviation fuel price NEW DELHI: Seeking uniform prices for basic petroleum products across all States, the Empowered Committee of State Finance Ministers on VAT (value added tax) on Monday asked the Centre to reveal its exact policy on petro goods price fixation as well as the reason why these prices currently differed from one State to another. "We would like to know in detail why basic prices of petro products are fixed at varying rates in different States