Difference between "up to interpretation" and "up for interpretation"

Question

I was reading this article and I came across the following sentence:

An emerging artist is usually defined as someone at the early stages of their career. Maybe, as an “emerging” artist, you're honing your style and have landed some recognition from a critic, but you don't have commercial representation yet. ... The word “mid-career” is also up to interpretation.

In my search for the meaning of up to interpretation I also found up for interpretation which in turn led me on a search for the difference between up to and up for but that does not seem to help.
I am still not sure about the difference in meaning between up to interpretation and up for interpretation (if there is any).

Answer 1

The word “mid-career” is also up to interpretation.

That means it depends on interpretation

whereas: The word “mid-career” is also up for interpretation.

That means that it has been designated for interpretation or to be interpreted.

Answer 2

lets look at it this way... if @iBug is correct about the typo then we have nothing to discuss... but we have two ways of somethings as it comes to the collocation for Up

we have:

1. We are up to sth... means we have decided to do sth or we are about to do sth (sth = something) Example: I know you are up to something == (I know you have something in mind and you want to do it)
2. we are up for sth... means we are eager to do something... can be a decision made before and now we are showing our passion to do it. Example : I am up for camping == (I stand with those who want to camp)

hope I could be clear