As long as your project is within the 30-day window, as mentioned in the revision requests section, It will get treated as a revision request.
While this does require a bit more time on my end to listen for changes made to the mix that affect what is done in mastering, my goal is to make the song sound the absolute best, and make you (and your fans) happy!
However, if it is outside the 30 days, this would be considered re-master. On the rare occasion that this is needed, you will need to book a new mastering session with me, but I will happily apply a 50% discount off of the price you paid for the initial project. From here onward, I will treat it as a new mastering project, and the regular rules for revision requests apply.