Final answer:
Emergency preparedness plans should be reviewed and updated at least once every year to ensure they are current and accurate.
Step-by-step explanation:
Emergency preparedness plans must be reviewed and updated as required to reflect any significant changes in staff assignments, or the design and arrangement of the premises. According to standard emergency management practices, these plans should be reviewed at a minimum once every c) Year. This is to ensure that all personnel are up to date on their responsibilities and that the plans reflect the current layout and capabilities of the premises.