Part 135
Part 135 is the US regulation for on-demand commercial operations, including nearly all private jet charter. An operator must hold an FAA-issued certificate, name each aircraft on it, train and check pilots to commercial standards, observe flight and duty limits, keep maintenance programmes approved by the FAA, and meet stricter weather and runway rules than private Part 91 flights. When you charter a jet in the United States, your flight should be operated by a Part 135 certificate holder, and you can verify the certificate number on the FAA website. Brokers do not hold certificates; they arrange flights on certificated operators' aircraft, and a good broker will tell you which operator is flying you.