There is created the South Carolina Tom Yawkey Wildlife Center Trust Fund, the income and principal of which must be used only for the purposes of supporting the operation and maintenance and the acquisition of additional real property complementary to those tracts of real property owned by the South Carolina Department of Natural Resources in Georgetown County, South Carolina, including South Island and the greater parts of North Island and Cat Island, known collectively as the Tom Yawkey Wildlife Center. All gifts, grants, and contributions for this purpose must be accounted for separately from other assets of the fund. The State Treasurer is the custodian of the fund and shall invest its assets in an interest-bearing account pursuant to South Carolina law.