modification of another, a single Convention application may, subject to this section and section nine, be made in respect of those matters at any time within twelve months from the effective date of the earliest of the said applications for protection. (5) In considering the validity of applications made in terms of subsection (3) or (4) and in determining other relevant matters under this Act the Registrar shall have regard to the effective dates of the applications or the Convention applications concerned relating to the several matters claimed in the specification, and the requirements of subsection (4) of section seven shall, in the case of any such application, apply separately to the applications for protection in respect of each of the said matters. (6) Where an application for a patent, not being a Convention application, is accompanied by a specification purporting to be a complete specification, the Registrar may, if the applicant so requests at any time before the expiration of the period specified in subsection (2) and before the acceptance of the specification, direct that it shall be treated for the purposes of this Act as a provisional specification and proceed with the application accordingly. (7) Where a complete specification has been lodged in pursuance of an application for a patent accompanied by a provisional specification or by a specification treated by virtue of a direction under subsection (6) as a provisional specification, the Registrar may, if the applicant so requests at any time before the acceptance of the complete specification, cancel the provisional specification and post-date the application to the date of lodging of the complete specification. 9 Contents of specification (1) A specification shall— (a) indicate whether it is a provisional or a complete specification; and (b) commence with a title clearly indicating the subject to which the relevant invention relates. (c) contain an abstract of not more than two hundred words and drawings, if any. [inserted by Act 9 of 2002, with effect from the 20th December, 2002.] (2) A provisional specification shall fairly describe the invention. (3) A complete specification shall— (a) fully describe the invention and the manner in which it is to be performed; and (b) disclose the best method of performing the invention known to the applicant at the time when the specification is lodged at the Patent Office; and (c) end with a claim or claims defining the subject-matter for which protection is claimed. (4) The claim or claims of a complete specification shall— (a) relate to a single invention; and (b) be clear and succinct; and (c) be fairly based on the matter disclosed in the specification. (5) A specification may, and if so required by the Registrar shall, be accompanied by drawings and such drawings shall be deemed to be part of the specification: Provided that if drawings which accompanied a provisional specification are sufficient for the purpose of a complete specification, it shall suffice if that complete specification refers to such drawings. (6) Subject to subsections (1) to (5), a complete specification lodged at the Patent Office after a provisional specification or with a Convention application may include claims in respect of developments of or additions to the invention which was described in the provisional specification or, as the case may be, in respect of which application for protection was made in a Convention country, being developments of or additions in respect of which the applicant would be entitled to make a separate application for a patent: Provided that an application shall, in so far as the complete specification contains