St. Elias Mines

I contacted My Direct Investing broker...regarding the shares I have purchased through my TFSA account. This is what I learned, if the stock is on the venture exchange and under $3.00 it can not be short sold. If SLI goes over $3.00 it can be... there is nothing we can do to control the investing company from borrowing these shares out, aside from paying a fee and having the share certificate mailed out directly to me. I want to capitalize on the growth from this investment being Tax Free, are there risks that were not aware of? Are there different policies for different investing companies?

Anyone with more insight to this please advise...