Rule 10

1. [Indications Under Article 8(5)]
a) A Contracting Party may require that any communication:
(i) indicate the name and address of the applicant, owner or other interested person;
(ii) indicate the number of the application or patent to which it relates;
(iii) contain, where the applicant, owner or other interested person is registered with the Office, the number or other indication under which he is so registered.
b) A Contracting Party may require that any communication by a representative for the purposes of a procedure before the Office contain:
(i) the name and address of the representative;
(ii) a reference to the power of attorney, or other communication in which the appointment of that representative is or was effected, on the basis of which the said representative acts;
(iii) where the representative is registered with the Office, the number or other indication under which he is registered.

2. [Address for Correspondence and Address for Legal Service] A Contracting Party may require that the address for correspondence referred to in Article 8(6)(i) and the address for legal service referred to in Article 8(6)(ii) be on a territory prescribed by that Contracting Party.

3. [Address Where No Representative Is Appointed] Where no representative is appointed and an applicant, owner or other interested person has provided, as his address, an address on a territory prescribed by the Contracting Party under paragraph 2, that Contracting Party shall consider that address to be the address for correspondence referred to in Article 8(6)(i) or the address for legal service referred to in Article 8(6)(ii), as required by the Contracting Party, unless that applicant, owner or other interested person expressly indicates another such address under Article 8(6).

4. [Address Where Representative Is Appointed] Where a representative is appointed, a Contracting Party shall consider the address of that representative to be the address for correspondence referred to in Article 8(6)(i) or the address for legal service referred to in Article 8(6)(ii), as required by the Contracting Party, unless that applicant, owner or other interested person expressly indicates another such address under Article 8(6).

5. [Sanctions for Non-Compliance with Requirements Under Article 8(8)] No Contracting Party may provide for the refusal of an application for failure to comply with any requirement to file a registration number or other indication under paragraph 1a)(iii) and b)(iii).