A.27 (4) The description set out in the application shall disclose the invention in a manner which is sufficiently clear and complete to enable a person having ordinary skill in the art to carry out the invention, and shall indicate at least one mode known to the applicant in which the invention can be performed. (5) Where an invention refers to or involves the use of biological material that is not available to the public and cannot be described in the patent application in such a manner as to enable the invention to be reproduced by a person skilled in the art, the description shall be regarded as inadequate for the purposes of this Act unless — (a) the biological material has been deposited with a depositary institution recognised by the Minister no later than the date on which the patent application was filed at the Office; (b) the application as filed contains relevant information available to the applicant on the characteristics of the biological material deposited; (c) the application states the name of the depository institution and the deposit accession number; and (d) other prescribed conditions regarding the formalities for the deposit and the supply of samples of the deposited material are complied with. (6) For purposes of subsection 5 (a) an international depositary authority recognised under the Budapest Treaty shall be recognised without requiring a Minister’s decision to recognise it. (7) A claim referred to in subsection (1) shall be clear and concise and shall be fully supported by the description, and the description and any drawings filed may be used to interpret the claim. (8) An abstract referred to in subsection (1) shall not be taken into account for the purpose of interpreting the scope of the protection but shall merely serve as technical information. 13. (1) An application for a patent may, at any time before the patent is granted, be withdrawn by the applicant. (2) The applicant may, of his or her own initiative at any time before the grant of a patent, amend or correct his or her application. (3) The applicant shall not, in amending his or her application under this section, include any material matter which was not disclosed in the initial application as filed. 14. (1) An application for a patent shall be in respect of a single invention or, where it is in respect of a group of inventions, the inventions shall be so linked as to form a single general inventive concept or have a unity of invention. (2) The fact that a patent has been granted on an application that did not comply with the requirement of unity of invention shall not be a ground for the invalidation or revocation of the patent. Withdrawal and amendment of application Unity of invention