The Consultation Sequence and Its Agreement Documents
The process runs in a fixed order and each step has its own finding, its own consulting parties and its own response period. Skipping ahead to negotiate mitigation before the effect is characterized is the most common way a review collapses.

The rule in short
Subpart B of 36 CFR Part 800 sets out four steps: initiation under 800.3, identification of historic properties under 800.4, assessment of adverse effects under 800.5, and resolution under 800.6. The preservation officer, Indian tribes, local governments, the applicant and interested members of the public are consulting parties. Resolution normally ends in a memorandum of agreement, or in a programmatic agreement for complex or repeated undertakings.
Federal historic review is a sequence, and the order is not decorative. Each step produces a finding that the next step depends on, and each finding has a defined audience and a defined period for response. A sponsor who understands the sequence can predict the schedule. A sponsor who negotiates mitigation before the effect has been characterized usually pays for mitigation that was never required.
Initiation and identifying who takes part
Section 800.3 opens the process. The agency official establishes that an undertaking exists and that it is a type of activity with potential to cause effects, then identifies the appropriate State Historic Preservation Officer or, where the undertaking is on or affects tribal lands, the Tribal Historic Preservation Officer. The same step requires the agency to plan how the public will be involved and to identify other consulting parties.
Public involvement is a separate obligation rather than a subset of consultation. The agency must seek and consider the views of the public in a manner reflecting the nature and complexity of the undertaking, its likely effects, the likely public interest, and any confidentiality concerns. In practice this ranges from a notice in a project newsletter for a routine action to a series of meetings for a project that will change a downtown. Where the undertaking is also subject to environmental review, agencies commonly coordinate the two public processes rather than run them twice.
The consulting parties are not a courtesy list. They include the preservation officer, Indian tribes and Native Hawaiian organizations that attach religious and cultural significance to properties that may be affected, representatives of local governments with jurisdiction, the applicant for federal assistance or permits, and additional individuals and organizations the agency invites because of a demonstrated interest. Tribal consultation is owed regardless of whether the property lies on tribal land.
Identifying historic properties
Section 800.4 requires the agency to determine and document the area within which the undertaking may cause changes, review existing information, seek information from consulting parties and the public, and then take steps reasonable and good faith to carry out the identification. Properties found are evaluated against the National Register criteria in consultation with the preservation officer.
Two findings can come out of this step. If no historic properties are present, or none will be affected, the agency documents a finding of no historic properties affected, notifies consulting parties and the process ends unless someone objects within the response period. If historic properties are present and may be affected, the process moves to assessment. How the study boundary is drawn and how eligibility is decided without a nomination is covered in the area of potential effects and eligibility determinations.
When the agency documents a finding and sends it to the preservation officer, that officer generally has thirty days to respond. Failure to respond within the period allows the agency to proceed. Applicants who assume a slow office means a stalled project have this backwards; the risk runs the other way, because a sponsor who does not track the response period may miss the moment when an objection was in fact lodged and the finding is now contested.
Assessing the effect
Section 800.5 supplies the criterion. An adverse effect occurs when an undertaking may alter, directly or indirectly, any of the characteristics of a historic property that qualify it for the National Register in a manner that would diminish the integrity of location, design, setting, materials, workmanship, feeling or association. Effects that are cumulative, delayed in time or distant in place are counted.
Findings at this step are not simply announced. The agency notifies the consulting parties, provides the documentation supporting the finding, and makes it available for public inspection. A consulting party that disagrees may object, and where objection is made and not resolved, the Advisory Council may be asked to review the finding. That review does not change who decides, but it puts an independent statement of the disagreement into the record the agency must consider.
The finding is either no adverse effect or adverse effect. A no adverse effect finding is often conditioned on the project being carried out as described, and those conditions become binding commitments. The substance of the criteria and the treatments commonly used to avoid a finding are set out in what counts as an adverse effect and what mitigation can require.
| Step | Regulation | Question answered | Document produced |
|---|---|---|---|
| Initiation | 36 CFR 800.3 | Is there an undertaking, and who consults? | Consulting party list and public involvement plan |
| Identification | 36 CFR 800.4 | What historic properties are present in the study area? | Identification report, eligibility determinations |
| Assessment | 36 CFR 800.5 | Will the undertaking diminish qualifying characteristics? | Finding of no adverse effect or of adverse effect |
| Resolution | 36 CFR 800.6 | How will the harm be avoided, minimized or mitigated? | Memorandum of agreement |
| Alternative track | 36 CFR 800.14 | Can a class of undertakings be handled at once? | Programmatic agreement or program comment |
Resolution and the agreement documents
Section 800.6 governs the last step. The agency notifies the Advisory Council on Historic Preservation of the adverse effect finding and consults with the preservation officer and other consulting parties to develop measures that avoid, minimize or mitigate the harm. The product is a memorandum of agreement signed by the agency official and the preservation officer, by the Council where it participated, and often by the applicant and other parties invited to sign.
Who signs matters as much as what the document says. Signatories can amend or terminate the agreement; invited signatories accept its terms but cannot terminate it; concurring parties endorse it without either power. Applicants are ordinarily invited signatories, because the stipulations bind them but the agency does not want the project sponsor able to unwind the agreement. Reading the signature block is therefore the fastest way to understand who controls the document after it is executed.
An executed agreement filed with the Council evidences that the agency has satisfied its obligations for the undertaking. The stipulations are enforceable commitments, and they typically survive into construction contracts and permit conditions. Where identification cannot be completed before approval, or where an agency runs a repeating program, a programmatic agreement under section 800.14 replaces the case-by-case document and sets out how identification and treatment will occur later. Both instruments assume a settled understanding of what qualifies the property, which is why the criteria described in the National Register criteria and integrity keep reappearing, and why the limits explained in what listing actually restricts matter to owners whose property enters this process without their consent.
Points to carry away
- The four steps are initiation, identification, assessment of effects and resolution.
- The State or Tribal Historic Preservation Officer normally has thirty days to respond to a finding.
- Indian tribes must be consulted about properties of religious and cultural significance regardless of location.
- A finding of no historic properties affected ends the process at the second step.
- A memorandum of agreement records the mitigation and, once executed and filed, evidences compliance.
- A programmatic agreement is used where effects cannot be fully determined before approval.
Questions readers ask
Can a party be refused status as a consulting party?
Yes. Beyond the entities entitled to participate by regulation, the agency official decides which additional individuals and organizations become consulting parties, considering whether they have a demonstrated interest in the undertaking because of the nature of their legal or economic relation to the undertaking or affected properties, or their concern with the effects. A refusal should be explained in the record. Refused parties are not silenced; they can still comment through the public involvement provisions, and they can raise the refusal with the Advisory Council, which may ask the agency to reconsider.
What if an agency and the preservation officer cannot agree?
The process has an exit rather than a deadlock. If consultation fails to produce agreement, the agency official, the preservation officer or the Advisory Council may terminate consultation. Where that happens, the Council issues its comments to the head of the agency, and the agency head must take those comments into account and provide a summary of the decision reached. The agency retains the authority to proceed. What it loses is the protection of an executed agreement and the presumption that its process was adequate.
Does the consultation give a tribe a veto over a project?
No, and describing it as a veto misstates both what tribes gain and what agencies owe. Consultation is a government-to-government obligation to seek, discuss and consider the views of the tribe, conducted with sensitivity to the confidentiality of information about sacred sites. A tribe that objects has the right to have its objection recorded, to decline to sign an agreement, and to ask the Advisory Council to enter the process. The decision remains the agency's, and unresolved tribal objection is a fact the agency head must weigh, not a bar.
Sources
- eCFR — 36 CFR 800.3, Initiation of the Section 106 ProcessThreshold determinations, identification of the preservation officer and consulting parties.
- eCFR — 36 CFR 800.4, Identification of Historic PropertiesThe identification effort, evaluation against the criteria and the no properties affected finding.
- eCFR — 36 CFR 800.5, Assessment of Adverse EffectsThe criteria of adverse effect and the response period for a finding.
- eCFR — 36 CFR 800.6, Resolution of Adverse EffectsThe consultation to resolve effects and the content and signatories of a memorandum of agreement.
- eCFR — 36 CFR 800.2, Participants in the Section 106 ProcessWho participates, the tribal consultation obligation and public involvement.
- eCFR — 36 CFR 800.14, Federal Agency Program AlternativesProgrammatic agreements and the other alternatives to case-by-case resolution.
- eCFR — 36 CFR Part 800, Protection of Historic PropertiesThe complete part, including termination of consultation and Council comment.
Liberty Law Library is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
More in Historic Preservation
Listing on the National Register: Criteria and Process
Under 36 CFR 60.4 a district, site, building, structure or object qualifies for the National Register if it possesses integrity and meets one of four criteria: association with significant events, association with significant persons, distinctive design or construction, or the capacity to yield important information. Nominations travel through the State Historic Preservation Officer and a state review board to the Keeper, and 36 CFR 60.6 gives a private owner an objection that blocks listing.
Federal Undertakings and What Triggers Review
Under 36 CFR 800.16(y) an undertaking is a project, activity or program funded in whole or in part under the direct or indirect jurisdiction of a federal agency, carried out by or on behalf of an agency, carried out with federal financial assistance, or requiring a federal permit, license or approval. Section 800.3 requires the agency to decide first whether an undertaking exists and then whether it is the type of activity with potential to cause effects on historic properties.
Adverse Effect Findings and What Mitigation Can Require
Section 800.5 of 36 CFR finds an adverse effect where an undertaking may alter, directly or indirectly, any characteristic qualifying a property for the National Register in a manner that diminishes the integrity of location, design, setting, materials, workmanship, feeling or association. The listed examples include destruction, treatment inconsistent with the Secretary's Standards, relocation, visual and audible intrusions, neglect, and transfer out of federal control.


