Article 9 Assumptions as to dwellings
An authority may authorise a contractor who is authorised to take such steps as are mentioned in article 8 to exercise the functions of—
(a)
determining whether there is reason to believe that a particular dwelling will be or was an exempt dwelling for any period in a financial year; and
(b)
making the assumption that the dwelling will be or was either a chargeable dwelling or an exempt dwelling for the period in question.