How Difficult Will It Be to Remove Mars from the Planetary Protection Treaty?

[lifeonmercury]

In light of the strong desire to begin colonizing Mars in the near future, how easy will it be to remove Mars from the list of planets covered by the planetary protection treaty?

 

[1oldman2]

https://planetaryprotection.nasa.gov/ Doesn't appear to address the timeline or procedure. It appears to be a "wait and see" approach as research data matures.