Article 26 1.

For the purposes of the application of Article 20(1) of the basic Regulation, the insured person shall present a document issued by the competent institution to the institution of the place of stay. For the purposes of this Article, the competent institution shall mean the institution which bears the cost of the scheduled treatment; in the cases referred to in Article 20(4) and 27(5) of the basic Regulation, in which the benefits in kind provided in the Member State of residence are reimbursed on the basis of fixed amounts, the competent institution shall mean the institution of the place of residence.