“51. Establishment of information collection centres or check posts and inspection of goods in transit:- (7) (a). The officer detai n ing the goods under sub-sectio n (6), shall record the s t atement, if any, given by th e consignor or consignee o f the goods or his representativ e or the driver or other p erson Incharge of the good s vehicle and shall require him to prove the genuineness o f the transaction before hi m in his office within the perio d of seventy-two hours of the detention. The said office r shall, immediately ther e after, submit the proceeding s alongwith the concerned r ecords to the designated office r for conducting necessary enquiry in the matter; (b) The designated of fi cer shall, before conducting th e enquiry, serve a notice o n the consignor or consignee o f the goods detained und e r clause (a) of sub-section (6), and give him an opportu n ity of being heard and if, afte r the enquiry, such office r finds that there has been a n attempt to avoid or evad e the tax due or likely to be du e under this Act, he sh a ll, by order, impose on th e consignor or consignee of the goods, a penalty, whic h shall be equal to thirty p e r cent of the value of the goods.