The limit matters more than the register
A register tells you the equipment is sound. It says nothing about whether the task suits it. Most ladder incidents in cleaning involve equipment in good condition being used for something it was never intended for: reaching sideways, working with both hands, carrying a bucket up, or standing on the top step because the fitting is just out of reach. Those are decisions, not equipment failures.
So the scope should state what may be done from a ladder or step platform and what may not. A written limit gives a cleaner permission to leave a task undone and report it, which is the outcome you want. Without one, a conscientious person under time pressure will improvise, and improvisation at height is where the harm occurs.
