I am all for as few rules as possible but find the rules here as far as stock a little nonsensical.
STOCK
Stock can be obtained from anywhere provided NO PRIOR STYLING has been done other than trunk chopping and root work. You can collect, purchase from a bonsai or general nursery, take a cutting/layer from an untrained tree or you may already own suitable stock. It just cannot have had any previous Styling! There is no price restriction and any species can be used.
When we trunk chop to style the tree we almost as a standard use wire to position the new leader. But now we have supplementary information from at least one mod that we can not have used wire? This begs the question what about wire that has been used to twist the trunk of saplings.
Also if you are going to chop the trunk as a standard you also chop back branches so that they do not become dominant over the new leader. You would be hard pressed to find stock from a bonsai nursery or our own collections that has not gone through this.
I find myself thinking back searching my memory whether I have ever put wire on trees I want to use even if it would have made no difference to the styling of branches in the entry. How do we know that stock we bought has never been wired.
"NO PRIOR STYLING has been done other than trunk chopping and root work" This suggests to me that trunk chopping is expected to be styling.
Then we have
Work can be done between 1st September 2011 and 31st October 2012. Final submissions and photographs must be submitted no later than Midnight EDST on 1st November 2012.
I would have thought the only work not allowed before the 1st of September is anything that does not come under the allowable stock. The reason being that normal timely practice could be to repot a tree or even dig it out of the ground or to trunk chop or hedge trim at this very moment.
So I could go and buy a tree from a bonsai nursery that has had this work done in the last week or so(whether I know or not) but if the tree is already in my collection I believe (from comments) it would be be deemed not allowed. Yet I was only doing what a bonsai nursery would be doing before I bought the stock.
Can't say I am sure what can be done to solve this except to say that if you want to have simple rules then I think you should try not to complicate them later with sub paragraphs

It's too bad your in such a hurry cause the stories I could tell you, Bushels and baskets of stories, hole crates full of stories. But if you can spare a moment I will tell you one story.