10.2. Future contractual liabilities and operating lease liabilities

Future contractual liabilities incurred on the dates ending the reporting periods that are not included in the consolidated statement of financial position include:

The Group as a lessee has concluded non-cancellable operating lease agreements as at 31 December 2018 and 31 December 2017. The Group uses property, plant and equipment, including, without limitation: longwall shearers, heading machines and mining machines, under operating lease agreements (lease, hire).

As at 31 December 2018, the cost of leasing fees under operating leases (lease or hire agreements) is PLN 137.3 million (PLN 110.6 million as at 31 December 2017).

The total amounts of future leasing fees under operating lease agreements are:

The Group also classifies perpetual usufruct right to land acquired gratuitously as an operating lease. The fees for perpetual usufruct right to land captured in the consolidated result as at 31 December 2018 are PLN 6.2 million (PLN 6.6 million as at 31 December 2017).

Future fees for the perpetual usufruct right to land:

The liabilities arising from the right of perpetual usufruct right to land are estimated on the basis of annual rates arising from the most recent administrative decisions and the useful life of the land covered by that right.