s 21 What shall not be a defence
In any proceedings against any person for an offence against section 5 it shall be no defence— (a) that the defendant purchased any goods in respect of which he is charged at a price exceeding the price fixed therefor under this Act; or (b) that any invoice or other document showing the price at which the goods were sold was endorsed to the effect that no responsibility could be accepted in respect of any error or omission in the invoice or document or was endorsed with the letters “E. & O. E.” or any other symbols or letters of a like nature indicating that the statements in the invoice or document were subject to correction.