This is very reasonable, I wish we had such a law in France. They're absolutely inflexible here.It is not 'legal' here, but it is allowed under some circumstances, such as medicinal use. I do know of someone who has a medicinal license and is able to grow his own for his own use. He is not allowed to transport it, only use it at home.
I may have written this already, but I was shocked by a report I saw on TV a few years ago when a man with terminal cancer was actually sent to jail for growing cannabis for medicinal purposes in his garden.