Punishment for second and subsequent offences. 35G.   If any person convicted of an offence under sub-section (1) of section 35A or section 35B or section 35D or section 35F is again convicted of an offence under any of the aforesaid provisions, he shall be punishable for the second and for every subsequent offence with rigorous imprisonment for a term which shall not be less than six months but which may extend to seven years and with fine.