(3) The transfer of ownership or the licensing of the right of exploitation may relate to
all or only some of the goods or services to which the mark applies. Only the licensing of the
right of exploitation may have its validity limited to the national territory of one of the
member States.
Article 27
Enforceability Against Third Parties
(1) The acts referred to in Article 26 above shall not be enforceable against third parties
unless they are recorded in the Special Register of Marks kept by the Organization.
(2) Subject to the conditions established by regulation, the Organization shall furnish to
any person who so requests a copy of the entries in the Special Register of Marks or a record
of the entries concerning marks that are the subject of a pledge, or a certificate attesting the
absence of any such entries, and also identity certificates reproducing the information on the
original specimen of the mark.
Article 28
Recording of the Judicial Decision
on Invalidity
Any final decision declaring the effects of the filing of a mark invalid on the national
territory of one of the member States shall be entered in the Special Register of Marks on
notification by the judicial body concerned, and a mention thereof shall be published by the
Organization.
Article 29
License Contract
(1) The owner of a mark may, by contract, grant to a person, whether natural person or
legal entity, a license enabling him to use the said mark for all or some of the goods or
services in respect of which the mark is registered.
(2) The duration of the license may not be longer than that of the registration of the
mark.
(3) The license contract shall be drawn up in writing and signed by the parties on pain
of invalidity.
(4) The license contract shall be entered in the Special Register of Marks of the
Organization. It shall not be enforceable against third parties until it is entered in the said
Register and published in the form specified in the Implementing Regulations relating to this
Annex.
(5) The license shall be cancelled from the Register at the request of the owner of the
mark or the licensee on presentation of proof of the expiry or termination of the license
contract.
(6) In the absence of provisions to the contrary in the license contract, the grant of a
license shall not preclude the licensor from either granting licenses to other persons, subject to
notifying the licensee, or from using the mark himself.
(7) The grant of an exclusive license shall preclude the licensor from granting licenses
to other persons and, in the absence of provisions to the contrary in the license contract, from
using the mark himself.