The Central Civil Services (Classification, Control & Appeal) Rules, 1965

4. CLASSIFICATION OF SERVICES:

(1) the Civil Services of the Union shall be Classified as follows:-

(i) Central Civil Services, Group 'A';

(ii) Central Civil Services, Group 'B';

(iii) Central Civil Services, Group 'C';

(iv) Central Civil Services, Group 'D';

(2) If a Service consists of more than one grade, different grades of such Service may be included in different groups.

Government of India Decisions: