(2)Nothing shall be deemed to be an offence under this section which is done in good faith,-(a)for the purpose of promoting the welfare or interests of any member of the police force by inducing him to withhold his services in any manner authorised by law; or(b)by or on behalf of any association formed for the purpose of furthering the interests of members of the police force as such, where the association has been authorised or recognised by the Government and the act done is done under any rules or articles of the association which have been approved by the Government.