Under the 2000 Ordinance, a patent shall not be granted-

(a) for invention the prevention of commercial exploitation of which would be necessary to protect the “ordre public” or morality, including to protect human, animal or plant life or health or to avoid serious prejudice to the environment, provided that such exclusion is not made merely because the exploitation is prohibited by any law for the time being in force;

(b) for plants and animals other than micro-organisms, and essentially biological processes for the production of plants or animals other than non-biological and microbiological processes;

(c) for diagnostic, therapeutic and surgical methods for the treatment of humans or animals;

(d) for a new or subsequent use of a known product or process; and

(e) for a mere change in physical appearance of a chemical product where the chemical formula or process of manufacture remains the same provided that this clause shall not apply to an invention fulfilling the criteria of patentability.