1.Where appropriate Member States may fix the level of support provided for in Articles 31, 37 to 41, and 43 to 49 of Regulation (EC) No 1698/2005 on the basis of standard costs and standard assumptions of income foregone.
2.Member States shall ensure that the calculations and the corresponding support referred to in paragraph 1:
(a)contain only elements that are verifiable;
(b)are based on figures established by appropriate expertise;
(c)indicate clearly the source of the figures;
(d)are differentiated to take into account regional or local site conditions and actual land use as appropriate;
(e)in the case of measures pursuant to Articles 31, 37 to 40 and 43 to 47 of Regulation (EC) No 1698/2005, do not contain elements linked to fixed investment costs.