You are granted a non-exclusive license to the photographs you receive from the shoot. If there are other businesses or individuals interested in using the images, they may either buy-in on the shoot from the beginning (cost sharing) or purchase image/s license afterwards.
Only those that have paid for my services or have bought a license to a set of images will be granted rights to use my photographs for promotional purposes.
Businesses and magazines can purchase a license to my photography at any time.