If, on expiry of a period of two years from notification of the grant, the operation for which it was awarded has not begun to be carried out, the Prefect will declare that the decision to award the grant has lapsed.
For operations that can be carried out in the short term, the prefect may, however, set a deadline of less than two years.
For the application of the first paragraph, the prefect may, in the light of the justification provided, extend the validity of the awarding order for a period that may not exceed one year.