Final answer:
The supplier has 60 days to complete an order using a DEA form 222 if it cannot initially be filled in its entirety. The form is used to order controlled substances and this requirement ensures compliance with DEA regulations.
Step-by-step explanation:
If a DEA form 222 order cannot be filled in its entirety, the supplier has 60 days to complete the order before the form expires. The DEA Form 222 is used to order controlled substances, and it is a requisite for compliance with the regulations set by the Drug Enforcement Administration. If a partial shipment is made, the balance must be supplied by the supplier within this 60-day timeframe.