Article R3334-1 of the French General Code of Local Authorities
For the distribution of the urban equalisation allowance between metropolitan departments, the synthetic index of resources and charges is obtained by adding the ratios defined in 1°, 2°, 3° and 4° of article L. 3334-6-1, respectively assigned weighting coefficients of 0.5, 0.25, 0.1 and 0.15.