contravention of this Act or a repealed Act may be required to appear before an immigration officer and the provisions of subsection (3) shall apply, mutatis mutandis. (5a) Any person who⎯ (a) contravenes subsection (1) or (3); or (b) fails without just cause to appear before an immmgration officer when required to do so in terms of subsection (4); shall be guilty of an offence and liable to a fine not exceeding level five or to imprisonment for a period not exceeding six months or to both such fine and such imprisonment [Subsection inserted by s. 4 of Act 22/2001.] (6) If, in any prosecution for a contravention of subsection (1), it is proved that the accused entered Zimbabwe, it shall be presumed, unless the contrary is proved, that he