To ensure a free and fair election, it is important to guarantee the security of electoral officers and materials. This means that measures should be taken to ensure that there is no interference or intimidation from any party or group during the election process. Security personnel should be deployed to polling units to ensure that voters can exercise their right to vote without fear or intimidation. Additionally, there should be adequate protection for electoral officers and materials to prevent them from being tampered with or stolen. This helps to ensure that the election results are a true reflection of the will of the people and not influenced by external factors.