Birla Carbon will change all North America contract price formulas from August 1, 2019. The long-used index up to this date, U.S. Gulf Coast High Sulfur Fuel Oil, will change to U.S. Gulf Coast 0.5 percent Sulfur Fuel Oil. Feedstock to make carbon black is sourced from markets driven by marine fuel. This market is undergoing fundamental changes driven by regulations widely known as MARPOL 2020 or IMO 2020, which establishes the maximum allowable sulfur content in marine fuel at 0.5 percent. While this regulation is effective January 1, 2020, the supply chain is adjusting now.