LAV charged that the founding of FLA had been an idea hatched by the communist leader Dominique Urbany.
As of 1946, FLA was the largest trade union centre amongst blue-collar workers.
An important factor contributing to this development was the exclusion of FLA from collective bargaining negotiations, a policy upheld by both the Luxembourgish employers as well as the trade union competitors (LAV and the LCGB).
FLA was however able to retain a foothold in industries in small and medium-sized companies in rural areas of the country for some time.
[2] In 1958 FLA, along with three other WFTU-affiliated labour centres in Western Europe (CGT, CGIL, EVC) set up a Common Market Action Committee.