Classification Into Tripartite And Bipartite Bodies

I have listed below the regulatory machinery but I don't know which are Tripartite bodies and which are bipartite bodies. Please help me to classify them into Tripartite and Bipartite bodies.
Statutory Machinery:-
1. Works Committee
2. Conciliation Officer
3. Board of Conciliation
4. Court of Enquiry
5. Voluntary Arbitration
6. Adjudication - i) Labour Courts ii) Industrial Tribunals iii) National Tribunal
7. Grievance Redressal Machinery
8. Welfare Officer
9. Standing orders
10. Centre and State Industrial Relations Machinery
Voluntary Machinery:-
1. Code of Discipline
2. Code of conduct
3. Formation of Joint Consultative Machinery
4. Collective Bargaining
5. Worker's Participation in Management Scheme
Thanks in advance.
Vishnu

LIST OF BIPARTITE AND TRIPARTITE BODIES IN INDIA
TRIPARTITE BODIES
1.INDIAN LABOUR CONFERENCE(I.L.C)
2.STANDING LABOUR COMMITTEE(S.L.C)
3.THE COMMITTEE ON CONVENTIONS
4.THE INDUSTRIAL COMMITTEE
OTHER COMMITTEES
-Steering Committee on Wages
-Central Implementation and Evaluation Machinery
-Central Board of Workers Education
-National Productivity Council
BIPARTITE BODIES
1.WORKERS COMMITTEES
2.JOINT MANAGEMENT COUNCIL