I'm part of a group that hosts craft shows on a military base. The guidelines are relatively loose but there is one regulation we have to enforce. If they are using logo material (John Deere, USMC, Athletic teams, etc, the crafter has to show the part of the selvage that states that the fabric/image has been licensed - that means the fabric manufacturer has paid for the right to use the image.

The other advice we give the sewer is to make sure there is appropriate permission if they have purchased a pattern or book. The publisher will often post a copyright. Most times it is meant that the book is copyrighted - not the patterns enclosed - but only the directions and instructions can not be reproduced. Some may say the pattern is for personal use - we take that to mean as long as you are personally making it it's ok to sell. Others that contain ORIGINAL designs specifically say OK for personal use but the quilts can not be sold. I've seen some of the Paper Piece designs copyrighted but that was for their original designs.

We always advise our crafters to check the wording in the copyright declaration. Most of the time it is the pattern/book itself is not to be reproduced. Unless it specifically says the craft or quilt can not be sold we impose no restrictions on the sale.