1. By 31 December 2020, the Commission shall, taking utmost account of the opinion of BEREC, adopt a delegated act in accordance with Article 117 supplementing this Directive by setting a single maximum Union-wide mobile voice termination rate and a single maximum Union-wide fixed voice termination rate (together referred to as 'the Union-wide voice termination rates'), which are imposed on any provider of mobile voice termination or fixed voice termination services, respectively, in any Member State.
To that end, the Commission shall:
(a) comply with the principles, criteria and parameters provided in Annex III;
(b) when setting the Union-wide voice termination rates for the first time, take into account the weighted average of efficient costs in fixed and mobile networks established in accordance with the principles provided in Annex III, applied across the Union; the Union-wide voice termination rates in the first delegated act shall not be higher than the highest rate among the rat
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