Drillers Can Frack First, List Chemicals Later in U.S. Plan

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Natural-gas companies drilling on U.S. land would be permitted to wait until after hydraulic fracturing is completed to disclose what chemicals they used, under a draft rule being considered by the Interior Department.

A version in February required companies to file a complete chemical makeup at least 30 days before work began, a mandate that drew complaints from energy trade groups, including the Washington-based American Exploration and Production Council. The rule might slow energy production, they said.