The validity of a wide range of powers granted to the Enforcement Directorate under the amended law against money laundering -- challenged by nearly 250 petitions -- will come up for a decision before the Supreme Court today. The verdict by the bench of Justices AM Khanwilkar, Dinesh Maheshwari and CT Ravi Kumar is likely to affect a huge number of opposition leaders -- including Congress's Sonia Gandhi and Rahul Gandhi -- who are under the scanner of the Central investigating agency.