(2) The Commissioner may at any time require that the form, nature or amount of such security shall be altered or renewed in such manner as he may determine. (3) The Commissioner may by endorsement permit a licence to be transferred from one duty warehouse to another in the area controlled by the same controller and in the possession of the person to whom the licence has been issued, but no duty warehouse licence shall be transferable from one person to another. (4) Not more than one licence shall be issued in respect of any duty warehouse. Agricultural distiller. 62. (1) No person shall be granted a licence under this Act as an agricultural distiller unless the Minister is satisfied that such person is capable of producing on his farm in respect of which the application for a licence relates more than five leaguers of wine per annum calculated at a strength of 11,5 per cent absolute alcohol by volume. (2) No licence issued under this Act to any person as an agricultural distiller may be transferred to any other person or from one farm to another. (3) Any licence issued under this section to any person shall lapse upon his death or upon his conviction for an offence under this Act or any law relating to the illicit manufacture, conveyance, supply or possession of intoxicating liquor. (4) For the purposes of subsection (3) the imposition of a penalty by the Commissioner under section 91 shall be deemed to be a conviction under this Act. Still to be licensed. 63. (1) No person shall own or have in his possession or under his control any still except under a licence prescribed in Schedule No. 8 and subject to any regulation: Provided that the Commissioner may, subject to any conditions he may impose, exempt from any provision in this subsection — (a) any licensed still maker in respect of any still manufactured or imported by him for sale and in his possession; or (b) any person in respect of any still which he has proved to the satisfaction of the Commissioner is in his possession solely as a curiosity or ornament or is used solely for such purpose as the Commissioner may, subject to any regulation, authorize. (2) Section 62(2), (3) and (4) shall mutatis mutandis apply to any licence issued in respect of a still under this Act to any person to whom a licence under this Act has been or had at any time been issued as an agricultural distiller. (3) If any agricultural distiller to whom a licence in respect of a still has been issued under this Act voluntarily abandons such still to the department, the Commissioner may, out of