The contract between the Polish operator PKP Intercity and Alstom called for the first eight Pendolino ED250 trainsets to be delivered on 6 May 2014, tested ('homologated') for operation at using European Train Control System Level 2 signalling. The tests had not been performed by May, and PKP announced that Alstom had failed to meet the contract terms and would be charged penalties as of May 6. Alstom responded that homologation in Poland at 250 km/h using ETCS Level 2 was impossible, since ETCS Level 2 was not operational anywhere in Poland, and the Central Rail Line (Poland) where the first ED250 Pendolino had reached 293 km/h in testing was equipped with ETCS Level 1, not Level 2. On 26 June 2014 a compromise was reached between PKP and Alstom under which the Pendolinos would be delivered under a two-stage homologation, first homologated for operation using ETCS Level 1 and eventually to be homologated for ETCS Level 2. The Pendolinos were put in service on 14 December 2014.