Collective agreements cannot override statutory mining leave bonuses; changes require employee consent or termination notice.

The Supreme Court dismissed the cassation appeal against a lower court ruling that awarded miners bonuses based on statutory rates rather than social welfare payments. The court found that while collective agreements and internal regulations could not alter statutory rights, they also lacked the authority to unilaterally reduce bonuses without a specific change notice or mutual agreement. Consequently, the court upheld the lower court's decision that the employer failed to properly notify employees of the unfavorable terms, mandating the payment of bonuses calculated according to the law.