Final answer:
The question is about the number of preferences that officers can submit for vacation periods throughout a calendar year. Unfortunately, the specific number of preferences is not provided in the given information.
Step-by-step explanation:
The subject of this question is Business. The question is asking about the number of preferences that officers can submit for vacation periods throughout a calendar year. According to the given information, officers can submit their preferences by October 31st of the preceding calendar year. However, they are limited to a certain number of preferences.
Unfortunately, the specific number of preferences is not provided in the given information. To answer this question, we would need additional information.