South African mining law does not treat a missing worker as an operational inconvenience. It treats it as a life-threatening emergency with legal obligations attached. For safety managers and procurement teams, the practical question is simple: what does the Mine Health and Safety Act require, and what technology satisfies it?
This guide covers what Section 16.7 personnel location requirements mean in practice, what a compliant system must be able to do, and what auditors look for.
What the Requirement Means in Practice
The Mine Health and Safety Act (Act 29 of 1996) places a duty on employers to ensure, as far as reasonably practicable, a safe working environment, and this extends to the ability to account for and locate personnel on the mine. Section 16.7 requirements relate to locating missing persons: when a worker cannot be accounted for, the mine must be able to establish where that person is, or where they were last known to be, so that an effective emergency response can be mounted.
In practical terms, compliance means a mine can answer three questions at any moment during a shift. Who is on site? Where is each person now? And if someone’s signal is lost, where were they when it happened?
Manual systems, such as tally boards, sign-in registers, and radio check-ins, technically address accountability but fail the speed test. They tell you someone is missing at shift end, hours after the fact, and they tell you nothing about where to look. This is why regulators and mining houses increasingly expect a technology-based MHSA Section 16.7 compliant missing person locator system on surface operations.
What a Compliant System Must Do
Track personnel in real time
Every worker on site carries a tag that continuously reports its GNSS position over a dedicated RF network. Coverage must span the full operational area, including open-pit and plant zones, without depending on cellular or WiFi networks that may not reach the whole site.
Record last known location
No positioning technology is perfect. Workers move through GPS shadow zones, and tags can be damaged. A compliant system records the last known location the moment a signal is lost, preserving the starting point for any search. This single capability is central to satisfying the location requirement.
Detect a missing person autonomously
The system, not a supervisor, should identify that a tag has stopped updating or that a worker has missed a checkpoint, and alert the control room immediately. Autonomous detection removes the delay between a person going missing and anyone noticing.
Produce an audit trail
Compliance must be demonstrable. That means automated logs of personnel presence, movement history, tag health, alerts raised, and responses taken. Platforms such as TrackPro live tracking and reporting generate this documentation continuously, so audit preparation is a report export rather than a records reconstruction exercise.
Preparing for a DMRE Audit: A Practical Checklist
- Confirm every person on site, including contractors and visitors, is issued a functional tag at access control.
- Verify RF beacon coverage across all active working areas, and document the coverage map.
- Test the last known location function in known GPS shadow zones and record the results.
- Check that red zone access control blocks entry for personnel with low-battery or faulty tags.
- Run a simulated missing person drill and measure time from alert to location confirmation.
- Ensure movement replay data is retained and retrievable for incident investigation.
- Keep certification documentation current, including ICASA approval for RF equipment operating in South Africa.
Beyond South Africa
Personnel accountability requirements are not unique to the MHSA. Regulators in other mining jurisdictions impose equivalent duties on operators to know who is on site and to locate personnel in an emergency, and multinational mining houses commonly apply a single global standard across their operations. A system engineered for MHSA Section 16.7 therefore positions international sites ahead of their own local requirements.
Compliance Is the Floor, Not the Ceiling
The regulation exists because searching for a missing worker without location data costs hours, and hours cost lives. The same infrastructure that satisfies the auditor also gives operations management real safety value: complete shift accountability, red zone discipline, faster emergency response, and post-incident analysis based on evidence rather than recollection.
Mine Safe Global designs, manufactures, installs, and supports the Missing Person Locator System for surface mining operations, with ICASA, IP, EMI and EMC, and MTEx certification. Request a free site assessment and MHSA Section 16.7 compliance review to see where your operation stands.
