When must tag lines be used according to OSHA regulation 1926.1431?

Using tag lines is essential when necessary to control the platform to ensure safety during rigging and lifting operations. OSHA regulation 1926.1431 addresses the importance of maintaining control over suspended loads, particularly in situations that could change due to environmental factors, such as wind or obstacles in the work area.

Tag lines help operators maintain control of the load’s position and prevent it from swinging or rotating unexpectedly. This control is crucial during lifting operations to mitigate the risk of accidents or injuries to workers on the ground or those operating nearby.

The other options do not fully capture the specific requirement for using tag lines, as they either imply a more conditional approach or restrict the use of tag lines based on factors that don’t align with OSHA's emphasis on the necessity for controlling a load effectively. The regulation clearly indicates that tag lines should be in use as a preventive measure wherever there is a need to manage the load safely, reinforcing that safety is paramount in operations involving lifted platforms.