Which characteristic indicates that an item is considered standard?

The attribute that signifies an item is considered standard is the designation of "Assigned HC - S." This indicates that the item has been assigned a hazard classification and deemed safe for handling and storage under specific conditions. The "S" reflects that the item adheres to recognized standards for safety, quality, and reliability, which are critical in explosives safety management.

In contrast, the other options highlight characteristics that do not align with standard items. "Not Assigned HC - NS" suggests that an item lacks a proper hazard classification, which can lead to uncertainties regarding its safety. Similarly, "No training for handling has been developed - NS" implies that there are no established guidelines or protocols for safely managing the item, which is crucial for safe operations. Lastly, "Quality and reliability have not been assessed - NS" indicates that the item has not undergone necessary evaluations to ensure it meets safety and operational standards. Collectively, these attributes do not support the classification of an item as standard, reinforcing why the assigned hazard classification with an "S" is the hallmark of a standardized item.