I. – For the properties mentioned in I of Article 1498:
1° Partial exemptions from direct local taxes are granted for the years 2017 to 2025 when the difference between the assessment established for the year 2017 in application of this code and the assessment that would have been established for that same year without application of A of XVI of Article 34 of Law no. 2010-1658 of 29 December 2010 on amending finance for 2010, in the version in force on 31 December 2016, is positive.
For each tax, the exemption is equal to nine tenths of the difference defined in the first paragraph of this 1° for the taxes drawn up in respect of 2017, then reduced each year by one tenth of this difference.
The exemption ceases to be granted from the year following that during which the property or fraction of property is concerned by the application of I of article 1406, unless the change in consistency concerns less than 10% of the surface area of the property or fraction of property;
2° Direct local taxes assessed for the years 2017 to 2025 are increased when the difference between the assessment that would have been assessed for 2017 without application of A of XVI of Article 34 of Law no. 2010-1658 du 29 décembre 2010 précitée, in the version in force on 31 December 2016, and the contribution assessed in respect of that same year is positive.
For each tax, the increase is equal to nine tenths of the difference defined in the first paragraph of this 2° for the taxes drawn up in respect of 2017, then reduced each year by one tenth of this difference.
This increase is abolished from the year following that in which the property or fraction of property is concerned by the application of I of Article 1406, unless the change in consistency concerns less than 10% of the surface area of the property or fraction of property.
II. – For the application of I:
1° Local direct taxes are understood to mean property tax on built-up properties, business property tax, council tax on second homes and other furnished premises not used as a main residence and their ancillary taxes;
2° The difference defined in the first paragraph of 1° and 2° of I is assessed for each tax taking into account its ancillary taxes and the levies provided for in article 1641.
It is assessed per property or fraction of built-up property for property tax on built-up properties;
3° Depending on the case, the cost of the exemption or the increase is shared between the local authorities and, where applicable, the public establishments for inter-communal cooperation, the public land establishments, the chambers of commerce and industry and the chambers of trades and crafts in proportion to their share in the sum of the positive variations in each fraction of the levy accruing to them.