Warning areas, military operations areas (MOAs), alert areas, and controlled firing areas (CFAs) are classified as:

The classification of warning areas, military operations areas (MOAs), alert areas, and controlled firing areas (CFAs) as non-regulatory special use airspace is grounded in their specific functions and regulatory guidelines. Non-regulatory special use airspace refers to airspace designated for specific activities and purposes that may restrict or determine the use of that airspace by other aircraft, but it does not have the same regulatory enforcement as controlled airspace.

Warning areas are typically established over water and may contain hazardous activities; however, they are not regulatory as they do not prohibit entry but rather warn pilots of potential hazards. Military operations areas are specifically designed for military training exercises, allowing military aircraft to operate without the constraints of general air traffic control; these areas remain non-regulatory in nature. Alert areas are intended to inform pilots of high volumes of pilot training or unusual aircraft operations, which again does not impose regulations on entry. Controlled firing areas involve activities that may be hazardous but are typically coordinated to ensure safety when actual firing operations are underway, avoiding the need for regulatory control since operations cease when aircraft are known to be present.

In sum, while these areas implement certain operational restrictions and provide warnings, they fall under the umbrella of non-regulatory special use airspace instead