9. Coverage of the costs for the realization of the projects. 1. [Pursuant to art. 23, paragraph 4, of the legislative decree 23 May 2000, n. 164, and taking into account the provisions of law no. 481, the costs incurred by the distribution companies for the realization of the projects in the manner set out in art. 8, can be covered, if they involve a reduction in natural gas consumption and limited to the part not covered by other resources, on the components of the tariffs for the transport and distribution of natural gas, according to criteria established by the Electricity Authority and gas. The costs incurred by the distribution companies for the realization of the projects in the manner set out in art. 8 may be covered, if they involve a reduction in electricity consumption and limited to the part not covered by other resources, on the components of tariffs for the transport and distribution of electricity, according to criteria established by the Electricity Authority and gas **] 04. (13) See, also, the Del.Aut.en.el. and gas 16 December 2004, n. 219/04.