Section 5, The Public Order Act, 1965

Notwithstanding anything contained in this Act or in the Trade Disputes (Declaration of Law) act, it shall belawful for one or more persons, acting on their own behalf or on behalf of a trade union or of an individual employer or firm in contemplation or furtherance of a trade dispute, to attend at or near a house or place where a person resides or works or carries on business or happens to be, if they so attend merely for the purpose so peacefully obtaining or communicating information, or of peacefully persuading any person to work or abstain from work.