FAQ n.19023

The “validity” of the Part-66 licence is not affected by point 66.A.20(b)(2). The licence itself remains valid 5 years from the last renewal.  
Nevertheless, compliance with point 66.A.20(b)(2) is required to ensure that the maintenance privileges are exercised by certifying staff that hold sufficient recent experience.
If you do not meet this point anymore, you lose your rights to exercise your privileges of certifying staff or support staff. 
Therefore, as holder of an aircraft maintenance licence, to exercise your certification privilege in accordance with 66.A.20(b)(2), please ensure:

•  You have accumulated 6 months of experience in the previous 2 years;

Note: see also AMC 66.A.20(b)(2) for possible reductions of experience, in particular for independent certifying staff. Demonstration of experience should be made on the particular or similar aircraft. Guidance on ‘similar’ aircraft is also provided in AMC 66.A.20(b)(2).

or

•  You can demonstrate that in the last 2 years, you have met the provisions for the issue of appropriate privileges, which means (refer to 66.A.45), as applicable to the case:

1)    going to a type-training course again (the need for OJT has to be assessed on case-by-case basis);

or

2)    when the aircraft endorsement does not require type training (aircraft belonging in Group 2, 3 or 4):

       a) pass a type evaluation, including practical assessment; 
or
        b) when no type evaluation is required for aircraft endorsement, for example:
            - a B2/B2L license endorsed with a full group 3 or 4 rating; or
            - for L-category licences (other than L5), 
being able to demonstrate, in the last 2 years, practical experience, which shall include a representative cross section of maintenance activities relevant to the licence subcategory (B2/B2L, L1, L1C, L2, etc.)

Note: “A representative cross section of maintenance activities” means representative cross-section of the tasks listed in Appendix II to AMC to Annex III (Part-66) “Aircraft Type Practical Experience and On-the-Job Training - List of Tasks”. “Demonstrate” means having a record thereof, such as a logbook.
Note: GM 66.A.20(b)2 will be reviewed and amended according to this interpretation  through rulemaking task RMT.0735.