13. A publisher who makes a false declaration in the proposal or refuses to sell a copy at the retail price mentioned therein or in any manner commits or attempts to commit any fraud in order to derive a benefit from publishers loss insurance shall forfeit all his rights under this act and in addition shall be liable to a fine of $200 to $500 or to imprisonment for not more than six months or to both such penalties at the same time.
R. S. 1964, c. 58, s. 13.