According to the Metrology Act, a product or liquid is prepacked when it is placed in a package of whatever nature without the purchaser being present and the quantity of product contained in the package has a predetermined value and cannot be altered without the package either being opened or undergoing a perceptible modification.
Supervision is performed in compliance with the provisions of the Rules concerning the quantity of Prepackages, which was published in the Official Gazette of RS (no. 110/02 and 89/08), and refers to prepackages intended for sale in uniform nominal quantities expressed in units of mass or volume, their values ranging from 5 g or 5 ml to 10 kg or 10 l.
MIRS is responsible for supervising the fulfilment of the requirements of this Rules by the packer or importer of prepackages or on the market.
During a supervision check the MIRS staff shall assess:
- Conformity of prepackages with the two basic metrology requirements, i.e. that each batch of prepackages should be manufactured so as to satisfy both the mean value requirement of actual quantities, which should not be less than the nominal quantity, and the requirement of a reasonably small portion of defective products. Acceptability of a batch shall be determined by the supervision body on the basis of the result of checking according to a reference method.
- Compliance of product marking - The markings of nominal quantities (smallest size of digits as well indication of units of measurement are prescribed) and the name or identification mark of the packer or importer must be impressed on the packing in an indelible, readily legible and visible way.
- Compliance and verification of the measuring equipment by which measurement or sampling is carried out - Legal measuring instruments such as automatic weighing instruments used for packing prepackages, or non-automatic weighing instruments used for weigh-checking the actual mass before putting products on the market, must be regularly verified (with a verification label, stamp or conformity certificate that can only be issued by an authorised MIRS employee or a legal person under Article 14 of the Metrology Act, serving as proof). All other measuring instruments used for checking density or capacity must be calibrated. Calibration of a measuring instrument is considered to be acceptable when its traceability to the international standards is assured, and when its calibration certificate indicates the uncertainty of measurement along with the result of measurement.
- Compliance of the documentation regarding the performance of internal quantity control.
The same requirements as for the products packed in Slovenia apply to imported prepackaged products. An importer who does not check the accuracy of packing himself, must obtain the necessary written guarantee allowing him to assume full responsibility.
After Slovenia has acceded the European Union, its meeting of additional requirements that apply to the e-marked products (the shape and dimensions of the "e" mark being laid down in Article 12 of the Rules), as well as of the provisions regarding mandatory degrees of nominal quantities for certain product types, will be subject to supervision.
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