Final answer:
Unused munitions are classified as waste military munitions (WMM) when they are unused and in the form of a commercial chemical product, needing proper disposal or recycling.
Step-by-step explanation:
Unused munitions become waste military munitions (WMM) when the two conditions are met: first, the chemical in the waste must be unused; and second, the chemical in the waste must be in the form of a commercial chemical product.
This means that if munitions have not been used for their intended purpose and remain in their original state as a product meant for commercial use, they are then classified as WMM. Such classification is important to manage the storage, disposal, or recycling of these materials in a safe and environmentally responsible manner.