The collected information shall refer to a single reference year that is common to all Member States by referring to the situation during a specified timeframe or date as follows:
Bainfidh an fhaisnéis a bhaileofar le bliain tagartha amháin ar bliain choiteann í ag na Ballstáit uile trí thagairt a dhéanamh don staid le linn achar ama nó dáta sonraithe mar a leanas: