Appendix 6 zu EASA Part-FCL:

10. Applicants for the competency-based modular IR(A) who hold a BIR and have experience of at least 50 hours of flight time under IFR as PIC on aeroplanes, shall:

(a) at an ATO:

(i) be assessed as having an acceptable standard of competency-based instrument rating theoretical knowledge;
(ii) receive appropriate flight training to extend IFR privileges in accordance with FCL.605.IR(a);
(b) after completion of (a);

(i) successfully complete the skill test for the IR(A) in accordance with Appendix 7;
(ii) demonstrate orally to the examiner during the skill test that they have acquired an adequate level of theoretical knowledge of air law, meteorology, and flight planning and performance.

Da steht nichts davon, dass man die komplette Theorie nochmal machen muss.