Section 6(4) in Central Civil Services (Classification, Control & Appeal) Rules, 1965
(4)Classification of Posts.Under the Central Civil Services (Classification, Control and Appeal) Rules, 1965, all Central Government posts are classified into four categories, viz., Group "A", "B", "C" and "D". This classification is based on the norms prescribed in Department of Personnel and Training Notification No. 13012/2/87-Estt. (D) dated the 30th June, 1987. The classification serves an important administrative purpose including in matters of recruitment/disciplinary cases, etc. Some allowances are also granted with reference to the classification of the posts. The Fifth Central Pay Commission had, however, recommended a new classification dividing all Central Civil posts into six categories namely, Top Executives, Senior Executives, Executives, Supervisory Staff, Supporting Staff and Auxiliary Staff. These recommendations of the Pay Commission had been examined and after consideration of all pros and cons of the matter, it has been decided not to accept classification of posts as recommended by the Pay Commission and to retain the existing classification into Groups "A", "B", "C" and "D".
