Conservation measures,
Conservation measures, as used in 21.15, means project design or mitigation activities that are reasonable from a scientific, technological, and economic standpoint, and are necessary to avoid, minimize, or mitigate the take of migratory birds or other adverse impacts. Conservation measures should be implemented in a reasonable period of time.
Source
50 CFR § 21.3
Scoping language
In addition to definitions contained in part 10 of this chapter, and unless the context requires otherwise, as used in this part: