law: Patents Act, 1970
  10. Contents of specifications
  (1) Every specification, whether provisional or complete, shall
  
  describe the invention and shall begin with a title sufficiently indicating the
  
  subject-matter to which the invention relates.
  (2) Subject to any rules that may be made in this behalf under
  
  this Act, drawings may, and shall, if the Controller so requires, be supplied
  
  for the purposes of any specification, whether complete or provisional; and any
  
  drawings so supplied shall, unless the Controller otherwise directs, be deemed
  
  to form part of the specification, and references in this Act to a
  
  specification shall be construed accordingly.
  (3) If, in any particular case, the Controller considers that an
  
  application should be further supplemented by a model or sample of anything
  
  illustrating the invention or alleged to constitute an invention, such model or
  
  sample as he may require shall be furnished before the acceptance of the
  
  application, but such model or sample shall not be deemed to form part of the
  
  specification.
  (4) Every complete specification shall-
  (a) fully and particularly describe the
  
  invention and its operation or use and the method by which it is to be
  
  performed;
  (b) disclose the best method of performing the
  
  invention which is known to the applicant and for which he is entitled to claim
  
  protection; and
  (c) end with a claim or claims defining the
  
  scope of the invention for which protection is claimed.
  (5) The claim or claims of a complete specification shall relate
  
  to a single invention, shall be clear and succinct and shall be fairly based on
  
  the matter disclosed in the specification and shall, in the case of an
  
  invention such as is referred to in section 5, relate to a single method or
  
  process of manufacture.
  (6) A declaration as to the inventorship of the invention shall,
  
  in such cases as may be prescribed be furnished in the prescribed form with the
  
  complete specification or within such period as may be prescribed after the filing
  
  of that specification.
  (7) Subject to the foregoing provisions of this section, a
  
  complete specification filed after a provisional specification may include
  
  claims in respect of developments of, or additions to the invention which was
  
  described in the provisional specification, being developments or additions in
  
  respect of which the applicant would be entitled under the provisions of
  
  section 6 to make a separate application for a patent.