The limits placed on TFSA's by the government are contribution limits. That means there is no limit placed on the value of your TFSA. New shares in Havilah as granted by your investment in SLI will appear in your TFSA if that is where you have your shares in that investment. If you also have SLI shares outside your TFSA, in a RSP for example, the proportional number of shares will also appear in your RSP.

Here's where there may be some confusion.

Will any new purchases in SLI for this year earn you more Havilah shares?

I don't have the answer to that question, perhaps another well informed member of this discussion forum can pipe in. I would assume that the calculation would be made for the exact day of the legal split of the company. In that case the calculation will likely be done considering share structure for that day. This would mean you could have bought more SLI shares (or even sold your shares) after that date and it would not affect what you have coming in Havilah.

IMHO.