Artikel 15

1. In exceptional circumstances, and with the agreement of the injured person, all or part of the periodical payment provided for in paragraphs 2 and 3 of Article 14 may be converted into a lump sum corresponding to the actuarial equivalent thereof when the competent authority has reason to believe that such lump sum will be utilised in a manner which is particulary advantageous for the injured person.
2. Where a declaration provided for in Article 2 is in force and the Member concerned considers that it lacks the necessary administrative facilities for periodical payments, the periodical payment provided for in paragraphs 2 and 3 of Article 14 may be converted into a lump sum corresponding to the actuarial equivalent thereof, as computed on the basis of available data.