| http://www.w3.org/ns/prov#value | - Notwithstanding paragraph 1, where an exclusive right is necessary for the provision of the service in the public interest, the validity of the reason that justified the authorization of the exclusive right will have to be reconsidered every year, except in those cases in which the inversion involves a pay-back superior to the year in which it will have to be reconsidered at least every three year
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