I have just reread this and it says GUIDELINES so it's not actually the rule, as I've read it anyway by the use of the word 'should' not 'must'.
"In addition, the following guidelines apply for those items listed to be eligible for entry into the YDC event competition:
- Auctions should have a maximum start price of 0.99 GBP (or the equivalent in the seller's local currency).
- No item listed for auction should have an expected value of more than 20.00 GBP (or the equivalent in the seller's local currency).
- Auctions should be standard auctions (i.e. not Featured, FrontPage, or with any listing extras/enhancements other than a gallery image).
- The following text should appear in listing descriptions:
This auction is an entry in the YDC nn charity auction competition.
All money raised by this auction will go to: {Add the name of the charity/good cause here}. "
So in that case, I will be honoured to undertake YDC 104.