Final answer:
An Event record must be published in order to be used, which involves making the data available to the intended audience.
Step-by-step explanation:
The question is focusing on the necessary steps for an Event record to be put into use. In the context provided, the correct option out of the ones listed would be that an Event record must be published. The process of publishing an Event record typically involves making the information available to the intended audience or the general public. This could be through various means such as online publishing or by releasing it in a report. Being catalogued, registered, or certified might be steps in the process before or after publishing, but they do not make the Event record universally available for use.