Rubbish this is a general guide and hi-lights items at more risk like bench tools, factory floor extensions ....i put 1yr on all mine. The key to this flexibility is reducing risk in the way the items with issues are identified and removed from use immediately i have the management get the staff to sign an extra clause regarding the portable equipment and before use everyday they are responsible to check for any issues or damage etc ...any found will have the items removed off the factory floor immediately. I come in and repair if possible and re-test and put back out on floor. This system gives a documented service and testing of the equipment and shows a routine inspection is carried out daily hence an extended testing period id employed.... this holds even more ground if you have a shop/factory floor charge hand responsible for ensuring any dangerous/damaged or questionable equipment is removed until checked and/or repaired and retested.
The risks of each kind of work-site and equipment needs assessing and if no extra measures are implemented then the guides should be used.