For income tax or corporation tax purposes, expenses incurred in connection with preliminary archaeological studies or archaeological operations that constitute an element of the cost price of a fixed asset may be deducted from the results of the financial year in which they are incurred, if they are carried out in application of the provisions of the amended law of 27 September 1941 regulating archaeological excavations, the amended law no. 76-629 of 10 July 1976 relating to the protection of nature and the law no. 76-1285 of 31 December 1976 reforming town planning.
Sums deducted in this way are deducted from income for the same financial year and subsequent financial years, at the same rate as depreciation of the asset and, in the event of its disposal, from income for the financial year in progress on the date of disposal for the portion not yet deducted or for the entire amount, depending on whether or not the asset is depreciable.