Final answer:
Suppliers must follow DEA regulations when partially filling a controlled substance order by supplying the balance within 60 days and keeping precise records. Failure to supply the remaining balance within the timeframe results in cancellation and the need for a new order.
Step-by-step explanation:
When a supplier is partially filling a controlled substance order, specific regulatory requirements must be followed. These stipulations are laid out by the Drug Enforcement Administration (DEA) and are designed to prevent diversion and abuse of controlled substances. A supplier may partially fill an order for a controlled substance if they do not have enough of the medication in stock to fill the order in full. However, the supplier must provide the balance of the order within a certain timeframe, typically 60 days. It is imperative for the supplier to keep accurate records of the partial fulfillment, including dates, quantities, and other relevant transaction details. If the balance of the order is not supplied within the specified period, the order must be cancelled, and a new one must be written for the additional quantity required.