letter of intent By nontenured teacher

We are being told that this letter is binding for non-tenured teachers but not for tenured teachers. We have to sign by the end of the month.

I am fairly sure that I want to return, but some of my team members are waiting to hear about other offers and don't know what to do. One teacher has a husband who is a lawywer and he says that since the letter of intent does not list the salary that she should be able to get out of the letter of intent as long as she does not sign her contract when she gets it.

I understand that the district needs to know who is coming back and who isn't, but since this has happened two years in a row, I am wondering how common this is.

Has anyone else experienced this?