Article 26 Every assignment or change of the rights associated with a mark recorded in the national register of the marks must be recorded so that it becomes binding against others. Article 27 The rights associated with a mark may be assigned totally or partially and may be subject to lien. The assignment even if partial may not be limited by location. The assignment or lien must be in a written form, otherwise it will be null and void. Article 28 The rights associated with a mark may be subject to an exclusive or a non-exclusive license. Article 29 The applicant for the registration or the owner of the mark may obtain withdrawal of the license to exploit the mark, if the beneficiary violates the provisions of the contract, based on a request to be submitted the competent court. Article 30 The applicant for registration of a mark may withdraw his application totally or partially prior to the grant of the mark with respect to the goods or services covered in the application. The withdrawal must be pursuant to a written request by the applicant or his agent. If the application for registration was filed by several persons, the said application may not be withdrawn except by all the applicants or by a person who has a legal power of attorney from all the applicants. If there has been a grant of exploitation rights or a lien the withdrawal request must be accompanied by a written consent from the beneficiary of the license or the holder of the lien. The withdrawal shall not prevent the publication of the application for registration in the official publication of the industrial property authority. Article 31 The owner of a registered mark may abandon, totally or partially, the effects of the registration with respect to the goods or services covered by the mark. Article 32 The cancellation action has to be filed at the competent court.