(a) The total of NOx emissions from heavy goods vehicles crossing Austria in transit shall be reduced by 60 % in the period between 1 January 1992 and 31 December 2003, according to the table in Annex 4.
(a) Déanfar iomlán astaíochtaí NOx ó thromfheithiclí earraí ag trasnú na hOstaire ar idirthuras a laghdú 60 % sa tréimhse idir an 1 Eanáir 1992 agus an 31 Nollaig 2003, de réir an tábla in Iarscríbhinn 4.