Complex sentence: For a time Aborigines could vote in some states and not in others, though from 1949, Aborigines could vote if they were ex-servicemen and by 1967 Aborigines had equal rights in all states and territories.
Split into simpler sentences: For a time Aborigines could vote in some states and not in others, though from 1949, Aborigines could vote if they were or had been servicemen. By 1967 Aborigines had equal rights in all states and territories.