Complex sentence: Since the Cherokee Freedmen Roll had no record of Indian blood quantum listed (unlike the "Cherokee By Blood" Rolls), they could not obtain CDIB cards and, under the EO, lost their right to vote in the Cherokee Nation.
Split into simpler sentences: Since the Cherokee Freedmen Roll had no record of Indian blood quantum listed (unlike the "Cherokee By Blood" Rolls), they could not obtain CDIB cards. Under the EO, they lost their right to vote in the Cherokee Nation.