(4) If the energy distributor fails to fulfill the obligations referred to in paragraph 3 of this article, it is obliged to pay a contribution to the Fund in an amount equal to the investments required to fulfill the unrealized part of the savings from the previous year. (5) The minister determines by ordinance the cumulative goal of new energy savings in direct consumption, alternative measures, criteria for calculating the amount of savings, the method of calculating the savings, the amount of the obligation to save energy for each energy distributor, the method of calculating the amount of the distributor&#39;s contribution to the Fund from paragraph 4 of this article, and the method of reporting to the distributor on an annual level about the achieved energy savings in direct consumption. The amount of savings obligations is based on objective and non-discriminatory criteria, which may also contain requirements with a social goal, including the requirement that a part of measures to increase energy efficiency be implemented as a priority for vulnerable customers. Duties of the energy supplier