Final answer:
After review by a commanding officer, a waiver request concerning aviation regulations or operations is typically forwarded to the Federal Aviation Administration (FAA).
Step-by-step explanation:
After a commanding officer has reviewed a waiver request, it should typically be forwarded to the correct authority overseeing such requests.
While the specific authority may vary depending on the context of the waiver, for aviation-related matters, the Federal Aviation Administration (FAA) is responsible for the regulation and oversight of all civil aviation in the United States.
Therefore, when dealing with waiver requests concerning aviation regulations or operations, the request would generally be sent to the FAA after initial review by the commanding officer.