Rules on painting people
I wish to paint portraits to sell. However, I would like to know the rules for doing this. I know that i cant use pictures from the internet so I bought a camera and I want to take pictures of real people. However, if I pay someone to take a picture of them then sell my finished painting, would I need some sort of licence to do this? would I need to create some sort of contract? I have tried searching for information on this subject but i have not found anything as of yet.
I would be grateful if someone knew what is correct in this situation