In Chan there is no categorisation of definitive and interpretable sutras, however, there are a couple of scriptures that are used to represent the common view of Mahayana according to their position. Although Tiantai claims the Lotus and the Nirvana Sutras as the final teachings of the Buddha, I've seen no problem using other texts in explaining their doctrines. Huayan focuses on the Avatamsaka Sutra naturally as the primary source of their teachings, while Pure Land has the three main sutras and portions of other scriptures.
So, if we use the definitive-interpretable categories, it is simply a question whether a scripture expresses explicitly what a given tradition holds as its doctrine or not. And if not then the exegete has to work until it does. As an example, in Chan it was first Shenxiu
who explained every sutra in a way to teach Chan, i.e. seeing the nature of mind. It is a feature of Chan that has been followed ever since.
On the other hand, in Japanese Pure Land Honen simply put aside all other sutras not directly relevant to birth in Amita Buddha's world without rejecting their content, but rendering them useless for anyone following the Pure Land path.