JAR–FCL 1.250 Type rating, multi-pilot – Conditions
(a) Pre-requisite conditions for training: An applicant for the first type rating course for a multi- pilot aeroplane type shall:
(1) have at least 100 hours as pilot-incommand of aeroplanes;
(2) have a valid multi-engine instrument rating (A);
FCL.720.A Experience requirements and prerequisites for the issue of class or type ratings — aeroplanes
(d) Multi-pilot aeroplanes. An applicant for the first type rating course for a multi-pilot aeroplane shall be a student pilot currently undergoing training on an MPL training course or comply with the following requirements:
(1) have at least 70 hours of flight experience as PIC on aeroplanes;
(2) hold a multi-engine IR(A);
There is no mention of validity anywhere in FCL.720.A. It is, of course, possible that there is an assumption that you cannot 'hold' an invalid rating. The fact that ratings not valid when the licence is re-issued are transferred to a box entitled "Ratings
previously held by licence holder" might be taken to support this assumption. If this is the case then any requirement in Part-FCL for an applicant to 'hold' a qualification must be taken to mean that the qualification must be valid, which raises all sorts of problems.