A Data Subject is the observation about whom the data relates.
Usually a Data Subject is a natural person, but in the context of ASSURED, we expand this definition to refer to an observation that is represented by a single row in microdata. Under this definition, a Data Subject could also be a commercial entity, a group of people such as a family, a sensitive habitat, etc.
To ensure the clarity and readability of the text, we tend to refer to the Data Subject as if they were a natural person (i.e. referring to Data Subjects as 'they') but it should be understood that the principles expressed also apply to other types of Data Subjects.