In which scenario would you use advice code 2B?

Advice code 2B is specifically used in situations where a requested item is critical, and it cannot be substituted with any other item. This code communicates to the supplier or the logistics personnel that the specific item requested is essential for the operation or mission and must be fulfilled as specified, without any alternatives.

Utilizing advice code 2B ensures that the urgency and importance of the item are clearly conveyed, which helps avoid delays that could arise from needing substitutions that may not meet the required specifications or functionality. This is particularly vital in military and operational contexts, where equipment or supplies can be time-sensitive and specific in nature.

The other options represent different scenarios that do not align with the definition or purpose of advice code 2B. The focus of this code is strictly on items needing to be supplied as requested without alternatives, reinforcing the importance of accuracy and reliability in supply chain logistics in critical situations.