Lõikes 4 toodud ruumid ja rajatised peavad olema ehitatud nii, et kaupade kontrollimisel oleks välistatud toidukaupade ja toiduks mittekasutatavate kaupade kokkupuutumine ja ristsaastumine.
The lay-out, design and operation of the facilities and equipment must be such as to minimize the risk of error and permit effective cleaning and maintenance in order to avoid contamination, cross-contamination and any adverse effects generally on the quality of the products.