3° a list of products or services for which registration of the mark is requested, listed in the order of the relevant class or classes of the International Classification. Filing of the application shall be subject to payment of the prescribed fee. The applicant may withdraw the application at any time while it is pending. Article 143: Right of priority The application may contain a declaration in which the right of priority is claimed by the mark owner, in accordance with Paris Convention or a bilateral, regional, or multilateral convention to which the Republic of Rwanda is party, priority for one or more previous national, regional or international applications, filed by the applicant or by his legal predecessor in one, or for any, State party to Paris Convention and/or World Trade Organization or party to the applicable convention. The filing in Rwanda of that application before the expiration of the period of the right of priority shall not be invalidated by reason of any acts accomplished in the interval, in particular, another filing, the publication or exploitation of the mark, and such acts cannot give rise to any third–party right or any right of personal possession of the mark. The period of priority under paragraph (1) of this article is of six (6) months any State party to Paris Convention and/or member of World Trade Organization. Where the application contains the declaration claiming priority, the empowered authority may request the applicant to supply him, within the prescribed time limit, with a copy of the previous application, certified as true by the Industrial Property Authority with which it has been filed, together with the translation of this application where necessary. The empowered authority shall accept the form and the content of the certification mentioned as determined by the certifying authority. The declaration claiming priority shall indicate the date and number of the previous application as well as the State(s) where it has been filed. The effect of said declaration shall be that provided for by the Paris Convention or any other applicable convention. If the empowered authority observes that the application of the right of priority has not satisfied the requirements provided for in this article and the related administrative regulations, said declaration shall be considered not to have been filed. SECTION 4: EXAMINATION, OPPOSITION, REGISTRATION Article 144: According the filing date The empowered authority shall accord, as the filing date, the date of receipt of the application, insofar as the application contains the following, on the date of receipt: 1° an express or implicit indication that registration of the mark is requested;