(b) any cannabis, coca or opium poppy plant growing on any land which he has cultivated;
(c) any apparatus specially designed or any group of utensils specially adapted for the
production or manufacture of any narcotic drug, psychotropic substance or controlled
substance; or
(d) any materials which have undergone any process towards the production or manufacture
of narcotic drug, psychotropic substance or controlled substance or any residue left of the
materials from which a narcotic drug, psychotropic substance or controlled substance has
been produced or manufactured, for the possession of which he fails to account
satisfactorily.
30. Presumption as to documents in certain cases. Where in the course of an investigation for
an offence committed under this Act or any other law for the time being in force any document is
produced or furnished, or has been seized from the custody or control of any person, the Special
Court shall—
(a) presume, unless the contrary is proved, that the signature and every other part of such
document which purports to be in the hand‑writing of any particular person or which the
Special Court may reasonably assume to have been signed by, or to be in the hand‑writing
of, any particular person, is in that person's hand‑writing, and in the case of a document
executed or attested, that it was executed or attested by the person by whom it purports
to have been so executed or attested;
(b) admit the document in evidence, notwithstanding that it is not duly stamped, if such
document is otherwise admissible in evidence; and
(c) presume, unless the contrary is proved, the truth of the contents of such document.
31. Power to call for information. __ (1) An officer authorised under section 21 may, during the
course of an enquiry in connection with the contravention of any provision of this Act,__
(a) call for information from any person for the purpose of satisfying himself whether there
has been any contravention of the provisions of this Act or any rule or order made
thereunder;
(b) require any person to produce or deliver any document or thing useful or relevant to the
inquiry ;
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