From the EPA:

The U.S. Environmental Protection Agency (EPA) is proposing to amend requirements under the National Oil and Hazardous Substances Pollution Contingency Plan (NCP) to improve the nation’s ability to plan for and respond to oil spills. This proposal addresses issues raised by the public, responders, government, and industry officials during the 2010 Deepwater Horizon Oil Spill.

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The proposed Subpart J revisions include:
· New and revised product toxicity and efficacy test methodologies for dispersants, and other chemical and biological agents;
· New toxicity and efficacy criteria for listing agents on the Subpart J Product Schedule;
· Additional human health and safety information requirements from manufacturers;
· Revised area planning requirements for chemical and biological agent use authorization; and
· New dispersant monitoring requirements when used on certain oil discharges.

Read more here.