The database operator must allocate an identifier (referred to in this Chapter as a "unique identifier") to each person in respect of whom, and dwelling in respect of which, an entry is made in the database under this Chapter.
The identifier must be a sequence of letters, numbers or both that enables the person or dwelling to be distinguished from any other person in respect of whom, or dwelling in respect of which, there is an entry in the database.
This section does not require the database operator to allocate a unique identifier to a person to whom, or dwelling to which, a unique identifier has previously been allocated.