Employer unilaterally issued work regulations without union agreement; Supreme Court quashed ruling allowing this.

The Supreme Court quashed the lower court's dismissal of the plaintiffs' appeal to restore their previous working conditions. The plaintiffs argued that the employer's unilateral new work regulations violated the existing collective agreement and labor code. The court ruled that while the new regulations were invalid due to lack of union consent, the employer was legally permitted to establish them if the union failed to present a joint position within 30 days of the employer's proposal.