"I also want to stress that you cannot collaborate with people who are not on your team. This obviously means no collaborations with other teams, but it also includes people not involved with the competition, i.e. you can't get your sister to play drums for you, and you can't get your boyfriend to throw some vocals down either."
After discussing with a friend regarding my track last week and wanting to get live sax on my track, I want to express that making this a rule is actually detrimental to any benefit this contest is supposed to give, and is poor producer work ethic for those who have the resources to do this type of work.
When you use a sample library, you are collaborating with musicians that were strenuously recorded for use with your project. By claiming this to be a rule you are essentially saying using anything that isn't explicitly a synth is against the rules.
If the reason for the rule is because it puts individuals at an unfair advantage due to the expressive nature of live recording, I want to stress that the process of arranging for players and recording is a complicated, work intensive process, with a lot of variables both before and after recording that more than make up for the lack of sample tweaking and humanization to make your samples expressive.
Also, if the reason behind the rule is "samples only". What if I made my own samples of other people I want to use? If they just happen to play the same chord progress or melodic figure in my song, its still a sample.
In addition, if the point of this contest is arrangement and you are going to outlaw session musicians you should outlaw sample libraries altogether, because the guy that happens to own well recorded, expensive sample libraries like Komplete, EWQL, LASS, etc are already at a disproportionate advantage to the dude still scraping by on poorly recorded soundfonts and stock plugins. In addition sample libraries are pre-mixed and mastered, so if anything, pre-manufactured samples are cheating in a sense.
Now, I can see if you are concerned if external people are collaborating on the arrangement, but if you are doing the principle writing bringing in session players is exactly the same as loading up a patch in Kontakt, and thus shouldn't be an issue. I ask for you to reconsider your stance on this for future competitions.