I had a thought while reading a post by seaducer in another thread ("Gear you need for a class, well that varys with the shop, but most require mask, fins, snorkel and weight belt/weights. Gear you need to dive? The above plus a C card, the rest you will learn in class."). I've also seen LOTS of people suggesting on here that people rent before buying, so here's my thought: Should people be required in have a C-Card in order to buy gear other than mask, fins and snorkel?