Selling Quilts?

This sounds like a real minefield!

Last week I went to a fabric sale, bought a fat quarter bundle of 5 for $10.00. I am in Australia, A retiree on a limited fixed income. I belong to a Patchwork and quilting lub which is fortunate enought to have a shop where members are able to sell their handwork for a small commission, which many do. They will never make a fortune but can generally recoup the cost of their materials and are therfore able to go out and buy more fabric and make more things to sell. When I got home with my spoils if did the good thing and unwrapped them to wash, an lo and behold, on one only selvedge I saw this
"Non Commercial Home Use Only. Other Uses Prohibited. Do not use for Children's Sleepwear"
This group also makes a lot of charity quilts, but also makes some quilts to sell to fund the charity quilts, where do we stand if I used a piece of my 'forbidden' fabric? What am I allowed to do with this fabric I have purchased with my hard gained money, surely it is mine to do what I want to do with it,
Rieann