Signals from Two Trade Union Conferences Tilak D Gupta PATNA, Bihar's stale capital, was the venue of two all-India conferences of major left trade union centres. The Centre for Indian Trade Unions (CITU), controlled by the CPI(M), held its eighth national conference at Patna from March 3. The 35th session of the All-India Trade Union Congress (AITUC) attached to the CPI closely followed, beginning from March 11.