I.-The chargeable event for the tax is, depending on the case:
1° The date of issue of the initial building or development consent;
2° The date on which the initial tacit planning permission came into being;
> The date on which the decision to grant planning permission was made;
The date on which the initial tacit planning permission came into being
3° The date of the decision not to oppose an initial prior declaration;
> In the case of construction or development works, the date on which the decision was taken.
4° In the case of unauthorised construction or development or construction or development in breach of the obligations arising from the building or development permit, the date of the completion report or, in the absence of such a report, the date of completion of the construction or development in question.
II.
II – The rules applicable to the establishment of the development tax relating to exemptions, reductions, values per square metre and rates are those in force on the date of the chargeable event defined in I. The characteristics of the building are assessed on the due date specified in article 1635 quater G.
.
However, in accordance with the fourth paragraph of article L. 410-1 of the town planning code, if the authorisation is filed within eighteen months of the issue of a town planning certificate and if the taxation system resulting from the value, rate and exemptions set out in this town planning certificate is more favourable, this system is applied.