 If all else has failed, then for industrial action to commence the union must under section 234A(4) give at least seven days notice, accompanied with details of the workers to take part.Part VI, sections 247 to 272, contain administrative provisions relating to ACAS and the Central Arbitration Committee.Section 220 protects workers taking part in industrial action, including picketers who are acting in connection with an industrial dispute at or near their workplace who are using their picketing to peacefully obtain or communicate information or peacefully persuading any person to work or abstain from working.