Aboriginal Flag: indicates Client's Aboriginal or Torres Strait Islander descent.
Valid Aboriginal Flags are:
- AboriginalFlag = @ ....... Not Stated,
- AboriginalFlag = 1 ....... Aboriginal Only,
- AboriginalFlag = 2 ....... Torres Strait Islander Only,
- AboriginalFlag = 3 ....... Both Aboriginal and Torres Strait Islander,
- AboriginalFlag = 4 ....... Neither Aboriginal nor Torres Strait Islander.