Which of the following is a TRUE statement?

IAS $16$ allows certain significant parts of property plant and equipment to not be depreciated ever regardless of individual facts and circumstances in place.

IAS $16$ takes a component approach to depreciation, meaning each part of an item of property, plant and equipment with a cost that is significant in relation to the total cost of the item will be depreciated separately.

IAS $16$ takes a unified approach to depreciation, allowing all parts of property plant and equipment to be depreciated as a single item rather than being depreciated separately.

IAS $16$ allows certain significant parts of property plant and equipment, with a cost that is significant in relation to the total cost of the item, to be depreciated five years after being placed into service.