23 Receivables

  2008
$000
2007
$000

Current

   
Receivables 5,979 4,238
Allowance for impairment of receivables (14) (47)
Accrued revenue 3,558 2,341
GST receivable 9,180 6,819
Other receivables – external works 1,256 323
  19,959 13,674
Prepayments 2,127 596
  22,086 14,270

Reconciliation of changes in the allowance for impairment of receivables:

   
Balance at start of year 47 104
Doubtful debts expense recognised in the income statement 0 6
Amounts written off during the year (33) (63)
Balance at end of year 14 47

Ageing of receivables past due but not impaired based on the information provided to senior management, at balance sheet date:

   
Not more than 3 months 1,850 49
More than 3 months but less than 6 months 85 43
More than 6 months but less than 1 year 1 2
More than 1 year 2 49
  1,938 143

Receivables individually determined as impaired at the balance sheet date:

   
Carrying amount, before deducting any impairment loss 14 47
Impairment loss 0 (47)
  14 0

The PTA does not hold any collateral as security or other credit enhancements relating to receivables.