So, if franking credit for the financial year is $5001 or more,...

So, if franking credit for the financial year is $5001 or more, then one is obliged to hold any or all franking paying dividend company shares for the 45 day duration or else lose the lot. Thus if one holds shares in 3 different companies where each pays ff dividends, one needs to make sure each company's shares satisfy the holding rule or else all $5001 or more ff component becomes unclaimable.

Also the day of purchase and the day of disposal in to be added to the 45 days thus the duration is actually 47 days.

Don't rely solely on the aforementioned but that's the way I understand it - thus if I'm wrong, happy to be corrected. Perhaps seeking an accountant may be warranted for more accurate information. AIMO