Complex sentence: Section 6 granted the state of Alaska the right to select lands then in the hands of the federal government, with the exception of Native territory, so that nearly from the public domain would eventually be transferred to the state.
Split into simpler sentences: Section 6 granted the state of Alaska the right to select lands then in the hands of the federal government, with the exception of Native territory. As a result, nearly from the public domain would eventually be transferred to the state.