440. If workplaces are reduced, or working conditions adversely affected by the measures listed below, the latter may be implemented only on condition that the relevant trade unions are notified at least three months in advance, and negotiations held with them on how to observe the workers' rights and interests. The measures concerned are: changes in the form of ownership, liquidation, reorganization of an enterprise and of its structural subdivisons, full or partial cessation of production on the initiative of the employer, owner or the management body representing him.