Hi Captain C,
I have read somewhere that the occupation remains "flagged" for at least one year before being actually excluded from the SOL list. As for instance, SOL 2015-2016 list has certain flagged occupations which will be potentially removed from 2016-2017 SOL list (w.e.f. 1st July 2016) - https://www.education.gov.au/flagged-occupations-sol-2015-2016.
In your opinion, is the information credible?
Brgds,
Mariner