Can I turn tracking point sending off?

I am confused over the tracking point sending. I don't want to be charged multiple times simply to send tracking points.

When I want to send a tracking point I will send a message, which includes position. 

On the safety plan, if I can't turn it off and go on a 3 day thru hike, the bill would be horrendous. 

There is nothing in the manual to help me. 

Surely it should b a choice?