Enhance penalty in certain cases after previous conviction

If any employer who has been convicted of any offence under sub-section (1) of section 9 or section 11, 12, or 13 of sub-section (1) of section 14 or sections 16, 17, 18, 19, 21 , 22, 23, 24 , 25, 25A, 25-B, 43, 49, 54 or 58 is again guilty of an offence involving contravention of the same provision he shall be punished on a subsequent conviction with fine which shall not be less than fifty rupees and which may extend to one thousand five hundred rupees.