I. – Taxpayers aged over seventy-five on 1st January of the year of taxation are exempt from property tax on built properties for the building inhabited by them, when the amount of income for the previous year does not exceed the limit provided for in article 1417.
II. – Taxpayers who no longer benefit from the exemption provided for in I :
1° Are exempt from the property tax on built properties relating to the building inhabited by them in the first and second years following the year in respect of which they benefited from the exemption provided for in the same I for the last time;
2° Benefit, for the calculation of the property tax on built properties relating to the building inhabited by them, from a reduction in the rental value of two-thirds in the third year and one-third in the fourth year following the year in respect of which they benefited from the exemption provided for in the said I for the last time.