Franking credits are a function of tax paid, and tax is always...

Franking credits are a function of tax paid, and tax is always determined on a cash basis. Tax is paid in monthly instalments for companies such as Tassal, the instalment pay rate is generally assessed by the ATO on historical information to determine future obligations, with each monthly activity statement allowing for readjustments etc.

The final tax calc is done at the end of the year after the audited financial statements but obviously dividends are decided & announced before then so often tax estimates are used to determine franking levels.
Tassal has likely recommenced paying income tax instalments so I think its likely we will get some franking credits for this distribution.

The movements of the SGARA balance are included in a tax calc as the movements realise gains or losses depending on the direction of movement. It would affect the accounting profit figure in a half yearly but wouldn't feature in the instalment calc month to month so wouldn't affect tax paid during the year only the balancing figure at the end.