The joint owners may derogate therefrom at any time by means of joint ownership regulations. Chapter VI Filing of applications for plant breed certificates 39. Applications for plant breed certificates must be filed with the competent authority in the forms and conditions fixed by regulation. Natural persons or legal entities with no domicile or company head office in Morocco must appoint an agent with its domicile or company head office in Morocco. Unless stipulated otherwise, the powers of the agent designated in the conditions provided for in the previous paragraph shall extend to all acts relating to the exercise of the breeder’s right and to the receipt of all the notices provided for in this Law, except the withdrawal of the application for a plant breed certificate or the waiver, in full or in part, of the rights deriving from the said certificate. 40. The benefit of the date of filing of the application shall be acquired if, at the time of such filing, all of the documents provided for by regulation under the first paragraph of Article 39 above have been produced and if the fees for services rendered laid down in Article 60 of this Law have been paid. Where the filing does not include the aforegoing documents, the application shall not be entertained and shall be sent back to the applicant, who shall be reimbursed for any fees paid. Any material errors must be corrected within the two months following notification to the applicant, failing which the application shall be rejected and sent back to the applicant. 41. A provisional reference may be given in the stead of a denomination to designate the variety which is the subject of the application, at the time of filing thereof. In this case, the denomination must be proposed, on pain of inadmissibility of the application, within two months following notification sent to the owner of the application by the competent authority. 42. A copy of the application for the plant breed certificate shall be given to the applicant, at the time of filing, bearing a stamp attesting to the day and time of filing of the application and including a registration number. 43. The application shall be entered in the National Register of Applications for Plant Breed Certificates provided for in Article 58 below, in the order of filing, under the number assigned to the applicant. This number must appear on all notices addressed to the applicant until the grant of the plant breed certificate, where applicable. 44. Until the grant of the plant breed certificate, the applicant may seek the correction of material errors detected in the documents filed. The request must be submitted in writing and contain the text of the amendments proposed by the applicant. It shall be entered in the National Register of Applications for Plant Breed Certificates and shall only be entertained if it is accompanied by proof of payment of the fees due for services rendered.