The required information shall be collected by the Member States using survey questionnaires the content of which shall comply with the arrangements defined by the Commission. Those measures, designed to amend non-essential elements of this Regulation, inter alia, by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 10(3).

The undertakings called upon by Member States to supply information shall be obliged to give true and complete information within the prescribed periods.

The survey may be waived where Member States already have information from other sources which is at least equivalent as regards precision and quality.

Where the Statistical Office so requests, Member States shall send it any information, in particular concerning methodology, necessary for the implementation of this Regulation.