4. Trade and Other Receivables

Actual
2008
$000
  Actual
2009
$000
2,073 Debtors from non-related parties 2,469
(27) Less: provision for doubtful debts (27)
2,046 Net debtors 2,442
Accounts receivables - Departments 229,899
368 Accounts receivables - Crown entities 336
2,414 Total trade and other receivables 232,677
  Represented by:
2,407 Current 232,670
7 Non-current 7

Debtors are shown net of provision for doubtful debts amounting to $0.027 million (2008: $0.027 million) recognised in the current year. The carrying value of debtors and other receivables approximates their fair value.

Current trade and other receivables includes $225.600 million due from the Office of Treaty Settlement for the Central North Island Treaty settlement, which was settled in July 2009.

As at 30 June 2009 and 2008, all overdue receivables have been assessed for impairment and appropriate provisions applied, as detailed below:

The provision for doubtful debts has been calculated based on expected losses for the Crown's pool of debtors. Expected losses have been determined based on an analysis of the Crown's losses in previous periods and review of specific debtors. Those specific debtors that are insolvent are fully provided for. As 30 June 2009, the Department has identified no debtors (2008: nil) that are insolvent.

Movements in the provision for doubtful debts are as follows:

Actual
2008
$000
  Actual
2009
$00
27 Balance as at 1 July 27
27 Balance as at 30 June 27