c) The Director General shall, upon request of the holder of the patent, authorize changes in the text or drawings of the patent in order to limit the extent of the protection conferred thereby. No change shall be allowed that would result in the patent containing subject matter that extends beyond the matter disclosed in the initial application or in an extension of the matter claimed in the patent. §13.11. Rights Conferred by the Patent; Limitations and Exceptions a) A patent shall confer on its holder the right to prevent third parties from exploiting the patented invention in Liberia. The scope of the right conferred by the patent shall be defined by the claims. b) The rights under a patent may not be used to prevent: i. acts in respect of a product covered by the patent after that product has been put on the market in Liberia or abroad by the holder of the patent, by a person acting with the holder‟s consent or having an economic tie to the holder, or by an otherwise authorized person. For the purposes of this provision, an economic tie shall exist between two persons where one of them may exercise on the other a decisive influence with respect to the exploitation of the patented invention, or where a third party may exercise such an influence on both persons; ii. acts done for purposes of scientific research in academic, educational or research institutions; iii. acts done for experimental purposes relating to the subject matter of the patented invention; iv. acts performed by any person to make, construct, use or sell the patented invention solely for uses reasonably related to the development and submission of information required under any law of Liberia or a country other than Liberia that regulates the manufacture, construction, use or sale of any product; v. acts performed by any person who in good faith, before the filing or, where priority is claimed, the priority date of the application on which the patent is granted, was using the invention or had made effective and serious preparations for such use in Liberia (the “prior user”); vi. acts done privately and for non-commercial purposes; vii. the use by a farmer of the product of his harvest for propagation or multiplication by him on his own holding or for exchange with other farmers in the context of traditional or communal practices, where the plant material used by the farmer to produce the harvest was put on the market in accordance with subsection (b) (i) of this Section; viii. the use of the invention in the body or gear of aircraft, land vehicles or vessels that temporarily or accidentally enter the jurisdiction of Liberia, or the importation of spare parts or accessories for the purpose of repairing such aircraft, vehicles or vessels; ix. the extemporaneous preparation in a pharmacy of a medicine for an individual in accordance with a prescription, and to dealing with the medicines so prepared. 74