What is required at all times regardless of altitude when operating within Class B airspace?

The requirement that must be adhered to at all times, regardless of altitude when operating within Class B airspace, is to adhere to the maximum speed limit. Class B airspace is generally found around busy airports and is designed to manage high-density traffic. The maximum speed limit within Class B airspace is typically set at 250 knots indicated airspeed (KIAS) but may be lower in some areas, specifically within 4 nautical miles of the primary airport when below 2,500 feet above ground level.

The intent of this regulation is to ensure safe and orderly flight operations, reducing the risk of collisions and enhancing overall airspace management. Pilots operating in this airspace must be vigilant about speed limits since they are often sharing airspace with larger aircraft and must operate safely around them.

While maintaining visual flight rules, flying below specific KIAS limits, or monitoring ATC instructions are all important best practices for aviation safety, the direct requirement pertaining to speed limits is the essential element here. In Class B airspace, maintaining compliance with speed limits is crucial for flight safety and regulatory adherence.