In order to qualify for skilled migration to Australia, you must nominate an occupation from the Medium and Long-term Strategic Skills List (MLTSSL). However, if you are applying for skilled migration via nomination by a State or Territory Government; you have the option of nominating an occupation from the Short-term Skilled Occupation List (STSOL).
If you apply for a General Skilled Migration visa and you are NOT nominated by a State or Territory Government, you must nominate an occupation from this Medium and Long-term Strategic Skills List (MLTSSL).
If you apply for a General Skilled Migration visa and you ARE nominated by a State or Territory Government, you must nominate an occupation from either this Medium and Long-term Strategic Skills List (MLTSSL) OR the Short-term Skilled Occupation List (STSOL).