20 Other non-current liabilities

Other non-current liabilities of €682 million (€691 million at 31 December 2013) comprise:

Prepaid income from regulated activities (€272 million) relates to: (i) the non-current portion of payments for balancing and stock replenishment invoiced in 2011, 2012 and 2013 (€160 million) to be returned to service users based on the provisions of Resolution 50/06 of the Authority, and (ii) the non-current portion of transportation revenue invoiced in excess of the restriction established by the Regulator and penalties charged to service users that exceeded the committed capacity (€112 million); this amount is to be adjusted based on the provisions of Resolution 166/05 of the Authority.

Deferred and prepaid revenue and income (€310 million) refers to: (i) fees for the use of strategic gas withdrawn and not replenished by users under the terms of the Storage Code (€295 million); and (ii) the non-current portion of the prepaid fee for the concession to use fibre optic cables given to a telecommunications operator (€15 million).

Other liabilities (€92 million) refer essentially to security deposits paid by users of the balancing service pursuant to Resolution ARG/gas 45/11 (€44 million).