Section J of JAR FCL 1.485 applies I believe but it really is an individual circumstances kind of thing - of which it is THEIR responsibility to ensure they comply with the regulations - not yours or anyone else.
An applicant shall be recommended for an examination by the approved FTO responsible for applicant’s training when the applicant has completed the appropriate elements of the course of theoretical knowledge
instruction to a satisfactorily standard. An applicant who has failed to complete the examination within the limits imposed by JARFCL 1.490 will in addition be required to produce evidence from an approved Training Organisation of further training.