Technical rules for applying paragraph 1, including specific cases where the indication of the net quantity shall not be required, are laid down in Annex IX.
Leagtar síos in Iarscríbhinn IX na rialacha teicniúla chun mír 1 a chur i mbfheidhm, lena n-áirítear cásanna sonracha ar dá réir nach gceanglaítear an ghlanchainníocht a léiriú.