Any Party included in Annex I may use 20XX as its base year for nitrogen trifluoride, hydrofluoroethers and perfluoropolyethers for the purposes of the calculation referred to in paragraph X above.
Any Party included in Annex I may use 20XX as its base year for nitrogen trifluoride, hydrofluoroethers and perfluoropolyethers for the purposes of the calculation referred to in paragraph X above.