Article 28 — Implementation of the performance scheme

For the implementation of the performance scheme, the Commission shall adopt implementing acts laying down detailed requirements and procedures in respect of Article 21(4) and Articles 22 to 27, in particular as regards: (a) the preparation, development, assessment, approval and revision of performance plans; (b) the setting of performance targets, the criteria and conditions for their assessment, including for assessing the consistency of targets for en route air navigation services with Union-wide performance targets, and a methodology to define breakdown values; (c) general principles for the allocation of common costs between en route and terminal air navigation services, as referred to in Article 21(4), point (l); (d) the monitoring of performance plans, of the performance of network functions, alert mechanisms for revision of performance plans and targets and for the revision of Union-wide performance targets during the course of a reference period and issuance of corrective measures as referred to in Articles 21(4), 23, 24, 25 and 27; (e) the timetables for all procedures; (f) a mechanism to address events, referred to in Article 21(4), point (m); (g) the setting of key performance indicators and indicators for monitoring. The Commission is empowered to set key performance indicators for terminal air navigation services in the key performance area of climate and environment once it is possible to establish indicators which are valid, reliable and measurable. Those indicators shall as a minimum be capable of demonstrating and measuring the impacts in that area which can be directly influenced by the air navigation service providers; (h) methodology for benchmarking; (i) the incentive schemes; (j) conditions for the establishment of the joint performance plans. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 48(3).