5 ETS 166 – European Convention on Nationality, 6.XI.1997 b acquisition of the nationality of the State Party by means of fraudulent conduct, false information or concealment of any relevant fact attributable to the applicant; c voluntary service in a foreign military force; d conduct seriously prejudicial to the vital interests of the State Party; e lack of a genuine link between the State Party and a national habitually residing abroad; f where it is established during the minority of a child that the preconditions laid down by internal law which led to the ex lege acquisition of the nationality of the State Party are no longer fulfilled; g adoption of a child if the child acquires or possesses the foreign nationality of one or both of the adopting parents. 2 A State Party may provide for the loss of its nationality by children whose parents lose that nationality except in cases covered by sub-paragraphs c and d of paragraph 1. However, children shall not lose that nationality if one of their parents retains it. 3 A State Party may not provide in its internal law for the loss of its nationality under paragraphs 1 and 2 of this article if the person concerned would thereby become stateless, with the exception of the cases mentioned in paragraph 1, sub-paragraph b, of this article. Article 8 – Loss of nationality at the initiative of the individual 1 Each State Party shall permit the renunciation of its nationality provided the persons concerned do not thereby become stateless. 2 However, a State Party may provide in its internal law that renunciation may be effected only by nationals who are habitually resident abroad. Article 9 – Recovery of nationality Each State Party shall facilitate, in the cases and under the conditions provided for by its internal law, the recovery of its nationality by former nationals who are lawfully and habitually resident on its territory. Chapter IV – Procedures relating to nationality Article 10 – Processing of applications Each State Party shall ensure that applications relating to the acquisition, retention, loss, recovery or certification of its nationality be processed within a reasonable time. Article 11 – Decisions Each State Party shall ensure that decisions relating to the acquisition, retention, loss, recovery or certification of its nationality contain reasons in writing.