In fulfillment of their obligations under Article 3, paragraph 1, the Parties included in Annex I shall, individually or jointly, ensure that their aggregate anthropogenic carbon dioxide equivalent emissions from [domestic] sources of the greenhouse gases listed in Annex A do not exceed their assigned [domestic] amounts, calculated pursuant to their quantified [domestic] emission reduction commitments inscribed in Annex B and in accordance with the provisions of this Article, with a view to reducing their overall [domestic] emissions of such gases by [more than][at least] [50][49] per cent below 1990 levels in the commitment period 2013 to 2017.
In fulfillment of their obligations under Article 3, paragraph 1, the Parties included in Annex I shall, individually or jointly, ensure that their aggregate anthropogenic carbon dioxide equivalent emissions from [domestic] sources of the greenhouse gases listed in Annex A do not exceed their assigned [domestic] amounts, calculated pursuant to their quantified [domestic] emission reduction commitments inscribed in Annex B and in accordance with the provisions of this Article, with a view to reducing their overall [domestic] emissions of such gases by [more than][at least] [50][49] per cent below 1990 levels in the commitment period 2013 to 2017.