19B. If any person contravenes any provision of this Ordinance or any rule made there under, or prevents a Seed Inspector from taking sample under this Ordinance or prevents him from exercising any other power conferred upon him by or under this Ordinance, he shall, on conviction, be punishable-(a) for the first offence, with imprisonment for a term no exceeding thirty days or with fine which may extend to taka five thousand, and(b) in the event such person having been previously convicted of any offence under this section, with imprisonment for a term not exceeding ninety days or with fine which may extend to taka twenty thousand.