The labour board issues a common employer declaration when O An employer decides to cooperate and follow the existing collective agreement with the new form of a business Oh. An employer decides not to cooperate and to avoid union obligations and also avoid following the collective agreement OG When workers vote to join a union Od when workers decide to vote for decertification When an employer decided to reduce all the employees salaries and deny them some of their benefits for the rest of their employment period, this is considered O Policygnevance Individual grevance Continuing group geance d Group gevance