When is it ok to tie off outside of a boom or aerial lift?

It is generally acceptable to tie off outside of a boom or aerial lift when working within a controlled environment that minimizes fall hazards, such as when the lift is stationary and on stable ground. Additionally, if the task requires the worker to be outside the lift for a brief duration, and proper safety measures are in place, such as using a suitable anchor point and personal fall protection equipment, it may be permissible. Always follow your organization's safety protocols and guidelines.