124D. Whoever, by any means, directly or indirectly, prints, publicises, sells, issues, circulates or reproduces any document or publication detrimental to parliamentary democracy shall be punished with imprisonment for a term which may extend to fifteen years:

Provided that no person shall be convicted of an offence under this section if he proves to the satisfaction of the court that the document or publication in respect of which he is charged was printed, published, sold, issued, circulated or reproduced, as the case may be, without his authority, consent and knowledge, and without any want of due care or caution on his part, and that he did not know and had no reason to suspect the nature of the document or publication.