1.Invalidity benefits shall be converted into old-age benefits, where appropriate, under the conditions laid down by the legislation or legislations under which they are provided and in accordance with Chapter 5.
2.Where a person receiving invalidity benefits can establish a claim to old-age benefits under the legislation of one or more other Member States, in accordance with Article 50, any institution which is responsible for providing invalidity benefits under the legislation of a Member State shall continue to provide such a person with the invalidity benefits to which he is entitled under the legislation it applies until paragraph 1 becomes applicable in respect of that institution, or otherwise for as long as the person concerned satisfies the conditions for such benefits.
3.Where invalidity benefits provided under the legislation of a Member State, in accordance with Article 44, are converted into old-age benefits and where the person concerned does not yet satisfy the conditions laid down by the legislation of one or more of the other Member States for receiving those benefits, the person concerned shall receive, from that or those Member States, invalidity benefits from the date of the conversion.
Those invalidity benefits shall be provided in accordance with Chapter 5 as if that Chapter had been applicable at the time when the incapacity for work leading to invalidity occurred, until the person concerned satisfies the qualifying conditions for old-age benefit laid down by the national legislations concerned or, where such conversion is not provided for, for as long as he is entitled to invalidity benefits under the latter legislation or legislations.
4.The invalidity benefits provided under Article 44 shall be recalculated in accordance with Chapter 5 as soon as the beneficiary satisfies the qualifying conditions for invalidity benefits laid down by a type B legislation, or as soon as he receives old-age benefits under the legislation of another Member State.