What were the key provisions of this act?
The key provisions of the Santhal Parganas Tenancy (Supplementary Provisions) Act, 1949 are as follows:

1. To provide for certain supplementary measures for giving effect to the Santhal Parganas Tenancy Act, 1949, and for other purposes connected therewith.
2. The act aimed at providing better conditions for tenants and ensuring their security of tenure.
3. It addressed issues related to land acquisition, consolidation, and distribution among the Santhal community in Bihar.
4. The act sought to protect the rights of tribal people and prevent exploitation by non-tribals.
5. It also aimed at promoting economic development and social welfare among the Santhal Parganas region.