When objects of union not unlawful

(1) The purposes of any trade union duly registered under this Act shall not, by reason merely that they are in restraint of trade, be deemed to be unlawful so as to render any member of 7 such trade union liable to criminal prosecution for conspiracy or otherwise. (2) The purposes of any trade union duly registered under this Act shall not, by reason merely that they are in restraint of trade, be unlawful so as to render void or voidable any agreement or trust.