Full text
where the property was depreciable property of a prescribed class, the lesser of the capital cost to the trust of the property, and the amount, determined immediately before the time of the disposition of the property, that is that proportion of the undepreciated capital cost of property of that class to the trust that the capital cost to the trust of the property is of the capital cost to the trust of all property of that class that had not, at or before that time, been disposed of, and