for at der kan vedtages naermere bestemmelser for visuel kontrol, maa begrebet synlige parasitter og visuel kontrol defineres, ligesom det maa fastsaettes, hvor hyppigt undersoegelserne skal foretages og under hvilken form;
Whereas the adoption of detailed rules relating to visual inspections implies that the concepts of visible parasites and visual inspection must be defined, and that the nature and frequency of the observations to be made must be determined;