Officials at Stormont have instructed Mid Ulster District Council to revise several proposed planning measures.
The directive specifically targets rules designed to make it easier to construct dwellings in the countryside.
Under current policy, new houses are permitted provided the farm remains operational and has been running for at least six years.
However, the department determined that the draft proposals would undermine established regional planning frameworks.
It warned that such changes could result in excessive development across the region.
Every council in Northern Ireland must produce its own Local Development Plan, which is subsequently reviewed by the department.
If a conflict with law or policy is identified during this review, the department can mandate alterations to the plan.
The ruling prevents Mid Ulster District Council from proceeding with the specific relaxations as currently drafted.
The department stated that the proposed measures would contradict broader regional planning objectives.
This binding direction means the council must halt implementation of the rejected policies immediately.
The council is now required to resubmit revised plans that align with national and regional standards.
No further changes to the original proposals are permitted without fresh approval from Stormont officials.