8.4. Other assets

Loans advanced are initially recognised at fair value and as at each reporting date are measured at amortised cost, using the effective interest rate method.

Non-current restricted cash represents cash of the Extraction Facilities Decommissioning Fund, accumulated by the Parent in a separate bank account from the first day of operation to the start of decommissioning of extraction facilities. The Fund’s cash is increased by the amount of interest accruing on the Fund’s assets. Due to formal and legal limitations on the use of this cash (it may only be applied towards specific long-term objectives), the assets accumulated in the Extraction Facilities Decommissioning Fund are recognised in the Group’s statement of financial position as other assets under non-current assets. The amount of the provision for decommissioning of production and storage wells is adjusted for any unused contributions to the Extraction Facilities Decommissioning Fund (Note 6.1.1.1).

Connection charge is disclosed under prepayments. The charge amount is accounted for throughout the average useful lives of the relevant assets.

Unlisted shares are measured at cost (less impairment losses, if any) because their fair value cannot be measured reliably.

Amounts receivable under long-term contracts are the excess of recognised income (measured using the percentage of completion method) over progress billings.

Other non-current assets and other current assets include mainly prepayments.