After four years of uncertainty, the United Nations announced official conversion rates for petroleum products exported to North Korea on Wednesday — formally putting an end to confusion over how much fuel the DPRK can import from countries using different units of measurement.

The U.N. 1718 Sanctions Committee’s new conversion rates include five types of petroleum products and a special “product basket” rate for when the type of fuel is unspecified. Previous submissions to the U.N. from Russia and China were in tons, and they now have also been retroactively converted to barrels.

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