This final rule authorizes uses of methyl bromide that qualify for the 2010 critical use exemption and the amount of methyl bromide that may be produced, imported, or supplied from existing pre-phaseout inventory for those uses in 2010. EPA is taking action under the authority of the Clean Air Act to reflect a recent consensus decision taken by the Parties to the Montreal Protocol on Substances that Deplete the Ozone Layer at the Twentieth Meeting of the Parties.