Which assignment availability code cannot exceed 12 months?

The assignment availability code that cannot exceed 12 months is Code 31. This code is specifically designated for personnel who are eligible for reassignment but are experiencing temporary duty or other contingencies that limit their availability for an extended period. The 12-month cap is established to ensure that personnel can be reassigned within a reasonable timeframe, maximizing operational readiness and resource allocation.

In contrast, other codes have different parameters; for example, Code 21 typically relates to personnel in training or those with pending reassignment who are not yet eligible. Code 11 is commonly used for individuals who are awaiting assignment and may have a different duration requirement. Code 41 may pertain to individuals in specific duty statuses that allow for longer periods of assignment availability. These distinctions highlight the specific purpose and usage of each code in managing personnel assignments effectively.