A remote pilot wants to operate a small UA within Class B airspace. What must the pilot do before flying?

Why: 14 CFR 107.41 requires prior authorization from Air Traffic Control before operating a small UA in Class B airspace. The Remote Pilot Study Guide (p. 5) confirms Class B is individually tailored, often shaped like an upside-down wedding cake, and always requires ATC authorization.

• Confuses a NOTAM (a one-way notice issued by the FAA) with the authorization process; filing a NOTAM does not substitute for the prior ATC authorization § 107.41 requires.
• Incorrectly assumes small UA are exempt from controlled-airspace rules; § 107.41 applies to Part 107 operations in Class B, C, D, and the surface area of Class E exactly as it would to any other small UA flight.