 
  
Updated July 11, 2022
Final Rules Changing Endangered Species Act Regulations
On August 27, 2019, the Trump Administration published 
decisions on threatened species under ESA. The final rule 
three final rules that change the implementation of the 
interprets the foreseeable future as extending in time only 
Endangered Species Act (ESA; 16 U.S.C. §§1531 et. seq.). 
as far as the Services can reasonably determine that future 
The final rules concern Section 4 (listing of endangered and 
threats and the species’ responses to those threats are 
threatened species; effective September 26, 2019) and 
“likely,” interpreted by the Services to mean more likely 
Section 7 (consultation with federal agencies; effective 
than not. The Services will determine the foreseeable future 
October 28, 2019) of ESA. On July 5, 2022, a federal 
on a case-by-case basis, based on the best data available, 
district court vacated and remanded all three rules to the 
and need not identify a specific time period. 
Services. Accordingly, the rules can no longer be enforced.  
Factors Considered in Delisting a Species 
The federal agencies that implement ESA include the U.S. 
The final rule clarifies that the same criteria used to 
list a 
Fish and Wildlife Service (FWS) and the National Oceanic 
species will be used to 
delist a species. Under the final rule, 
and Atmospheric Administration through the National 
a listed species will be delisted if, using the best scientific 
Marine Fisheries Service (NMFS). (FWS and NMFS are 
and commercial data available, it is extinct, does not meet 
referred to as the 
Services in this In Focus, and the term 
the definition of an endangered species or a threatened 
Secretary refers to the Secretary of the Interior or the 
species, or is not a “species” as defined by ESA. The 
Secretary of Commerce, as applicable.) The final rules are 
Services explain that this clarification addresses concerns 
summarized below, including some of the Services’ 
that the standard for delisting a species is higher than the 
explanations for the changes.  
standard for listing a species. 
Revision of the Regulations for Listing 
Critical Habitat Designation  
Species and Designating Critical Habitat 
When a species is listed under ESA, the Secretary also must 
This final rule (84
 Federal Register [FR] 45020) addresses 
designate critical habitat to the maximum extent prudent 
the listing of endangered and threatened species and 
and determinable. 
Critical habitat, as defined under ESA, 
designation of critical habitat under Section 4 of ESA. 
includes not only geographic areas occupied by the species 
Under Section 3 of ESA, an 
endangered species is defined 
at the time of listing but also areas outside that geographic 
as a species that is “in danger of extinction throughout all or 
area if the Secretary determines that such additional areas 
a significant portion of its range.” A 
threatened species is 
are essential for the conservation of the species. Federal 
defined as a species that is “likely to become endangered 
agencies must ensure their actions and actions approved or 
within the foreseeable future throughout all or a significant 
funded by them are not likely to result in the “destruction or 
portion of its range.” The Secretary determines whether a 
adverse modification” of critical habitat. Critical habitat 
species should be listed based on five factors related to 
designations only affect private land if some federal action 
threats to the species’ continued existence. Listing 
(e.g., a license, loan, or permit) is also involved. Critical 
determinations are to be made solely on the basis of the best 
habitat is designated based on the best scientific data 
scientific and commercial data available. 
available and after considering the economic or other 
relevant impacts of the designation.  
Identifying Economic Effects of Listing  
The final rule removes “without reference to possible 
The final rule revises the list of circumstances under which 
economic or other impacts” from the regulation on listing 
the Services might find it prudent to 
not designate critical 
determinations (50 C.F.R. §424.11(b)). This change allows 
habitat. It removes the circumstance that designating critical 
the Services to reference the economic effects of listing 
habitat would not benefit the species and replaces it with 
decisions. The final rule specifically recognizes, however, 
four other circumstances. For example, the Secretary could 
that ESA prohibits the Services from considering economic 
determine that designating critical habitat is not prudent 
factors in listing decisions, and that this rule does not alter 
because no areas meet the definition of critical habitat or 
the law to allow such factors to be considered in the 
there are no habitat-based threats to the species (e.g., the 
decision to list a species. The final rule states that this 
conservation of a species threatened by sea level rise cannot 
change “more closely align[s]” the rule to statutory 
be addressed through habitat management). 
language under ESA Section 4(b)(1)(A) and provides more 
transparency to Congress and stakeholders on the economic 
Critical Habitat in Unoccupied Areas 
impacts of listing decisions.   
The final rule clarifies when the Secretary may designate 
unoccupied areas as critical habitat. Under ESA, 
Foreseeable Future 
unoccupied areas must be 
essential to the conservation of 
The final rule creates a framework for how the Secretary 
the species to be critical habitat. To determine if an 
will evaluate the 
foreseeable future when making listing 
unoccupied area is essential, the Secretary must find that 
https://crsreports.congress.gov 
Final Rules Changing Endangered Species Act Regulations 
the occupied habitat of the species at the time of listing is 
Consultation Under Section 7 of ESA 
inadequate to ensure the conservation of the species. The 
The final rule aims to clarify consultation procedures under 
Secretary also must determine that it is reasonably certain 
ESA. The final rule specifies requirements to include in a 
the area will contribute to the conservation of the species 
request for formal consultation under Section 7 of ESA. 
and that the area contains at least one physical or biological 
These requirements include a description of the proposed 
feature essential to the conservation of the species, as 
action, efforts to offset effects of the action, a description of 
defined in regulation. The latter criterion addresses the 
the effects of the action, and several other factors that relate 
Supreme Court’s 2018 opinion in 
Weyerhaeuser Co. v. 
the action to the affected species. The final rule also sets 
FWS, which held that to be critical habitat, an area must 
guidelines and deadlines for completing informal 
first be 
habitat.  
consultations under ESA. Under the final rule, if there is a 
request from a federal agency for concurrence with its 
Revision of Regulations for Interagency 
determination that an action is 
not likely to affect a species, 
Cooperation 
the Services must provide a written concurrence or 
This final rule modifies (84
 FR 44976) definitions and 
nonconcurrence to this request within 60 days of its receipt, 
procedures used in implementing Section 7 consultations 
unless there is a mutual agreement to extend the deadline up 
under ESA. Under Section 7 of ESA, if federal actions or 
to 120 days from the receipt of the request. The final rule 
actions of nonfederal parties with a federal nexus might 
includes provisions intended to streamline Section 7 
adversely affect a listed species or its habitat, as determined 
consultations and exempts certain land management plans 
by the Secretary, the federal agencies must consult with 
from reinitiation of programmatic consultation when new 
either FWS or NMFS to ensure that their actions are “not 
species are listed and new critical habitat is designated. In 
likely to jeopardize the continued existence” of any 
formulating a biological opinion, the final rule states that 
endangered or threatened species or to adversely modify 
the Services can consider proposed activities that will offset 
critical habitat. This process is referred to as a Section 7 
the effects of the action.  
consultation. The term 
action includes any activity 
authorized, funded, or carried out by a federal agency, 
Revision of the Regulations for 
including issuing permits and licenses. 
Prohibitions to Threatened Species 
This final rule (84
 FR 44753) modifies FWS’s approach to 
Definitions 
extending prohibitions to threatened species. Section 4(d) of 
The rule revises the definition of 
destruction or adverse 
ESA requires that species listed as threatened under ESA be 
modification of critical habitat by adding the phrase 
as a 
regulated “to provide for the conservation of such species.” 
whole to the end of the definition and deleting a sentence 
Before the final rule, FWS only implemented species-
from the same definition that addressed effects from actions 
specific 4(d) rules, which can deviate from protections 
that alter physical and biological features essential for the 
provided for endangered species and be tailored to address 
conservation of the species or delay the development of 
the conservation of the species, for a limited number of 
such features. Adding 
as a whole to the definition is 
species. For most threatened species, FWS extended most 
intended to clarify the appropriate scale of the effect of the 
of the prohibitions that are provided for endangered species 
destruction or adverse modification of critical habitat. For 
to the threatened species through a default regulation 
example, according to the final rule, if a project affects a 
known as the 
blanket 4(d) rule. NMFS did not establish a 
portion of critical habitat, the Services would “place those 
blanket 4(d) rule and has implemented species-specific 4(d) 
impacts in context of the designation to determine if the 
rules for species listed as threatened.  
overall value of the critical habitat is likely to be reduced.” 
Under the final rule, the blanket 4(d) rule will no longer 
The final rule changes the definition of 
effects of the action 
apply to species listed as threatened after the rule takes 
by combining direct and indirect effects into 
effects and 
effect. Instead, species newly listed or reclassified as 
removing the reference to 
environmental baseline. Under 
threatened will have protective regulations only when FWS 
the final rule, 
effects of the action include all consequences 
promulgates a species-specific 4(d) rule. This provision is 
to listed species or critical habitat that are caused by the 
not retroactive, so the blanket 4(d) rule will continue to 
proposed action. The definition specifies that a 
consequence 
apply to threatened species listed before the rule takes 
is “caused by the proposed action if it would not occur but 
effect unless FWS promulgates a species-specific 4(d) rule 
for the proposed action and it is reasonably certain to 
for the species. FWS’s rationale for changing its approach 
occur.” The Services provide a two-part test to identify a 
is that eliminating the blanket 4(d) rule will more closely 
consequence: (1) whether the effect or activity would not 
align FWS policy with that of NMFS, and that species-
occur but for the action and (2) whether the effect or 
specific 4(d) rules will incentivize conservation, reduce the 
activity is reasonably certain to result from the action.  
need for permitting for certain actions, and streamline 
Section 7 consultation under ESA. FWS states that while it 
The final rule defines 
programmatic consultation. 
expects to promulgate a 4(d) rule concurrently with listing 
Programmatic consultation is a consultation that addresses 
or reclassifying a species as threatened, requiring the 
multiple agency actions on a program, region, or other 
simultaneous promulgation of such a rule is unnecessary. 
basis. Such consultations allow federal agencies to consult 
with the Services on multiple, frequently occurring, or 
Pervaze A. Sheikh, Specialist in Natural Resources Policy   
routine actions in a particular geographic area and on a 
Erin H. Ward, Legislative Attorney  
proposed program, policy, or regulation that would provide 
a framework for future actions. 
https://crsreports.congress.gov 
Final Rules Changing Endangered Species Act Regulations 
 
IF10944
 
 
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