Artikel 53

1. In order to receive the benefits in kind provided for in Article 38, paragraph 1, sub-paragraph (a), of the Convention, the worker shall submit to the institution of his place of residence a certificate that he is entitled to such benefits. This certificate shall be issued by the competent institution on the basis of information supplied, where appropriate, by the employer. In addition, where the legislation of the competent State so provides, the worker shall submit to the institution of his place of residence an acknowledgement of the notification of his occupational injury or disease. If he fails to submit these documents, the institution of the place of residence shall apply for them to the competent institution and, meanwhile, shall provide the benefits in kind available in case of sickness if the worker concerned is entitled to such benefits.
2. The certificate referred to in the preceding paragraph shall be valid until such time as the institution of the place of residence receives notice of its cancellation.
3. In the case of seasonal workers the certificate referred to in paragraph 1 of this Article shall remain valid for the expected duration of the seasonal work, unless in the meantime the competent institution notifies the institution of the place of residence of its cancellation.
4. For any claim for benefits in kind the worker shall submit the supporting documents normally required for the provision of benefits in kind under the legislation of the Contracting Party in whose territory he resides.
5. In the event of hospitalisation the institution of the place of residence shall notify the competent institution, as soon as this information is available, of the date of entry, the probable duration of hospitalisation, and the date of discharge.
6. The worker shall advise the institution of his place of residence of any change in his circumstances which might affect his entitlement to benefits in kind, in particular of any cessation or change of employment or occupational activity, or any change in his residence or temporary residence. The competent institution shall likewise inform the institution of the place of residence when a worker's entitlement to benefit ceases. The institution of the place of residence may at any time request the competent institution to supply any information relating to the worker's entitlement to benefit.
7. In the case of frontier workers, any medicines, bandages, spectacles, minor appliances, laboratory analyses and examinations shall only be provided or carried out in the territory of the Contracting Party in which they have been prescribed, and in accordance with the provisions of the legislation of that Party.