FAA-issued airspace advisories can specify an explicit effective period; for example, an FAA advisory issued in 2025 was set to last 90 days.
November 21, 2025
medium
temporal
Indicates that FAA advisories may include a defined duration of effect.
The U.S. Fish and Wildlife Service has applied a 'blanket rule' that automatically extends protective measures to animals and plants when they are classified as 'threatened', rather than requiring species-specific protective regulations in each case.
high
policy
Describes a regulatory approach under the Endangered Species Act for how protections are applied to species listed as threatened.