In-migration in the most general sense signifies a large-scale and continuing movement of population, into a different region of the same country or territory(Freedictionary.com; Merriam-Webster online, 2014).Migration is a global phenomenon seen everywhere on the earth among birds, animals and human caused by environmental, sociological and economic factors. According to UNESCO (2009),in-migration is defined as crossing of the boundary of a geographical area of poor potential, for a certain minimum period of time. It includes the movement of landless labours, refugees, displaced persons, uprooted people as well as economic migrants‟. Internal migration refers to the movement from one area (a province, district, municipality or village) to another within the same country. According to classical theories, migration is a rational decision made by an individual to move from a less advantageous situation to a more advantageous one. Human migration is the movement by people from one place to another with the intention of settling in the new location. The movement is typically over long distances and from one country to another or from one place to another within a country. Migration may be by individuals, family units or in large groups. The UN Convention on the Protection of the Rights of all migrant workers and members of their families defines a migrant worker as „a person who is engaged or has been engaged in a remunerated activity in a State of which he or she is not a national‟. It is with the same meaning that the Inter-State Migrant Workmen Act, 1979 defines “inter-state migrant workman” as “anyone recruited by or through a contractor in one State under an agreement or other arrangement for employment in an establishment in another State, whether with or without the knowledge of the principal employer in relation to such establishment