Notice of change requirements govern employer alterations to service conditions, worker intimation, portal upload, and union service. Any employer proposing to change conditions of service relating to a Third Schedule matter must give notice in Form IV to affected workers by electronic means, speed post or personal delivery, upload it on the designated portal if any, and display it conspicuously at the industrial establishment. Where a registered Trade Union, registered Trade Unions, a negotiating union or a negotiating council exists, a copy must also be served on the relevant secretary or secretaries in the same manner.