National aviation authority approvals, ICAO SARPs and applicable local regulations must permit GBAS implementation, certify equipment and authorise publication of GBAS Landing System (GLS) procedures.

A suitable site is required with clear satellite visibility, low local multipath potential, a manageable radio‑frequency environment and sufficient space for reference receivers, the Ground Facility and the VHF Data Broadcast (VDB) antenna.

Accurate coordinates and heights for reference receivers, antennas and runway reference points are essential for system calibration and to relate GBAS corrections to the published approach geometry.

Adequate GNSS availability and geometry must be demonstrated for the intended service volume. A local assessment of ionospheric behaviour and other signal‑threats is required for threat analysis.

Multiple, spatially separated reference receivers are needed to provide robust monitoring, redundancy and to meet integrity and availability targets.

A reliable ground processing system must compute differential corrections, perform integrity monitoring, and manage alarms and telemetry. The Ground Facility must conform to applicable MOPS and SARPs.

A certified VDB transmitter, properly sited, and an allocated VHF channel are required to broadcast GBAS messages to airborne receivers. Spectrum coordination with authorities is mandatory.

Uninterruptible power supply, site security, environmental control and secure communications are required to support continuous operation and remote monitoring.

Coordination with air traffic services is required to integrate GLS procedures into local procedures, NOTAM processes and contingency arrangements. Approach trajectories, missed‑approach segments and go‑around procedures must be designed and validated.

Flight inspection resources and validation procedures are needed to demonstrate that published GLS approaches meet the declared protection levels and predicted performance in the operational environment.

Defined maintenance schedules, continuous monitoring (including alarms and telemetry), and on‑site or remote support staff are required for periodic checks, calibration and corrective action.

Published technical documentation, pilot and ATC procedures, contingency handling guidance and appropriate crew/technician training are required before operations start.

Measures to detect and mitigate intentional or unintentional interference and spoofing are necessary. This includes spectrum monitoring, physical site security and operational procedures for reporting and managing GNSS anomalies.

Defined fallback procedures for GBAS outages (e.g., revert to ILS, SBAS or visual operations), NOTAM issuance processes and decision protocols must be established and exercised.