The correct act that requires employers in industrial establishments to define the conditions of employment is The Industrial Employment (Standing Orders) Act, 1946.
Purpose of the Act: This legislation mandates that employers must clearly define and communicate the conditions of employment applicable to their workmen. It requires the framing of 'Standing Orders' which cover aspects like classification of workmen, shift working, holidays, leave rules, wages, and termination conditions.
Reasoning for other options:
Therefore, only The Industrial Employment (Standing Orders) Act, 1946 directly addresses the requirement for employers to define employment conditions.
| LIST I (Acts) | LIST II |
| A. Biological Diversity Act | I. 972 |
| B. Environmental (Protection) Act | II. 982 |
| C. Indian forest Act (Revised) | III. 986 |
| D. Wildlife Protection Act | IV. 2002 |