The proposed Enterprise Agreement delivers a reduction in your terms and conditions of employment in return for an inadequate pay rise. It is being imposed upon you as an employee because the AFP does not believe you are a legitimate participant in the bargaining process. Voting no send a strong signal to the AFP that you care about your working conditions. It will give the AFPA bargaining team a strong mandate to take back to the AFP and demand a better deal.
Remember, EA 2012-16 was voted down the first time it was offered and what resulted was a better deal for employees.