I.-1. For the application of article 1636 B sexies, the municipal reference rate for property tax on built-up properties for 2021 is equal to the sum of the municipal and departmental rates applied in 2020 in the municipality.
The first paragraph of this 1 does not apply to the City of Paris.
2. By way of derogation from the first paragraph of 1, for the application of Article 1636 B sexies, the communal reference rate of property tax on built-up properties for the communes of the Lyon metropolitan area relating to the year 2021 is equal to the sum of the communal rate applied in 2020 and the rate applied in 2014 for the benefit of the Rhône department.
II.-The reference rate of property tax on built properties for the Lyon metropolis relating to the year 2021 is equal to the Lyon metropolis rate applied in 2020, less the rate applied in 2014 for the benefit of the Rhône department.