Which advice code advises against backordering the item?

The advice code that advises against backordering the item is 2C. This code is specifically utilized to indicate that any pending requisition should not result in a backorder. When a requisition is submitted with this advice code, the system or the processing personnel understands that fulfilling the request is not feasible, and thus, backordering the item is not permitted. This prevents unnecessary delays and ensures that the requesting unit is not left waiting for an item that cannot be supplied promptly.

In contrast, other advice codes such as 2B, 2J, or 2K may have different directives regarding item availability and backordering. For example, they may allow for backordering under certain conditions or may indicate that a substitution is appropriate. Understanding the nuances of these codes is crucial for efficient supply chain management and inventory control within military logistics.