Who is affected and how:

• Bureau of Land Management (BLM) and federal land managers: The nullification removes the agency's authority to implement or rely on the specified ROD and RMP amendment. BLM will need to decide whether to revert to the prior plan, reissue a planning document, or conduct further rulemaking and outreach, increasing administrative workload.

• Local communities and stakeholders in the Miles City Field Office planning area: Communities that expected or relied on changes from the ROD/amendment (for recreation, conservation, resource development, or infrastructure) may see plans delayed or altered. Uncertainty may affect local planning and economic activity.

• Ranchers, grazing permittees, and agricultural interests: If the amendment altered grazing allocations, seasons, or conditions, those changes would be undone, potentially returning to prior management conditions and requiring adjustments by permit holders.

• Mining, energy, and infrastructure operators: Any authorizations or planning certainty provided by the disapproved ROD/amendment would be removed, potentially delaying projects, permit approvals, or investment decisions until BLM issues new guidance or planning documents.

• Conservation and recreation groups: Conservation measures or public-land use rules included in the voided amendment would no longer be in effect; stakeholders favoring conservation may lose protections until new action is taken. Conversely, recreation access or other uses altered by the amendment could revert.

• State and local governments: Entities that coordinated with or relied on the ROD/amendment for land-use planning or permitting may face uncertainty and need to adjust local decisions.

Legal and procedural impacts: The disapproval under the CRA can prompt administrative steps by BLM (reinstating prior plans or initiating new rulemaking) and could lead to litigation by affected parties. The measure itself does not appropriate funds or alter substantive statutes; its primary effect is to remove the specific agency action from legal effect.