1.A frontier worker who retires is entitled in case of sickness to continue to receive benefits in kind in the Member State where he last pursued his activity as an employed or self-employed person, insofar as this is a continuation of treatment which began in that Member State. The term "continuation of treatment" means the continued investigation, diagnosis and treatment of an illness.
2.A pensioner who, in the five years preceding the effective date of an old-age or invalidity pension has been pursuing an activity as an employed or self-employed person for at least two years as a frontier worker shall be entitled to benefits in kind in the Member State in which he pursued such an activity as a frontier worker, if this Member State and the Member State in which the competent institution responsible for the costs of the benefits in kind provided to the pensioner in his Member State of residence is situated have opted for this and are both listed in Annex V.
3.Paragraph 2 shall apply mutatis mutandis to the members of the family of a former frontier worker or his survivors if, during the periods referred to in paragraph 2, they were entitled to benefits in kind under Article 18(2), even if the frontier worker died before his pension commenced, provided he had been pursuing an activity as an employed or self-employed person as a frontier worker for at least two years in the five years preceding his death.
4.Paragraphs 2 and 3 shall be applicable until the person concerned becomes subject to the legislation of a Member State on the basis of an activity as an employed or self-employed person.
5.The cost of the benefits in kind referred to in paragraphs 1 to 3 shall be borne by the competent institution responsible for the cost of benefits in kind provided to the pensioner or to his survivors in their respective Member States of residence.