Just to add a comment to englishal's hijack...
This is also true for the CBIR course and not just the EIR.
If you have an ICAO IR rating, you "just" need to pass a skill test to get an EASA IR/EIR rating.
From the regulations (245/2014)
8. Applicants for the competency-based modular IR(A) holding a Part-FCL PPL or CPL and a valid IR(A) issued
in compliance with the requirements of Annex 1 to the Chicago Convention by a third country may be
credited in full towards the training course mentioned in paragraph 4. In order to be issued the IR(A), the
applicant shall:
(a) successfully complete the skill test for the IR(A) in accordance with Appendix 7;
(b) demonstrate to the examiner during the skill test that he/she has acquired an adequate level of theoretical
knowledge of air law, meteorology and flight planning and performance (IR); and
(c) have a minimum experience of at least 50 hours of flight time under IFR as PIC on aeroplanes