If I'm reading the RTR rules right, the pull starter MUST be installed and operational for the boat to be legal to run in the RTR class, HOWEVER, it doesn't say that you have to use it. Byron, my recommendation would be to install the pull starter AND a starting belt. If you plan on moving up to larger boats, you will need a starter anyway. This way, you will have two ways of starting your boat and still be RTR race legal.
BTW, you live in BC dont' you? Are you coming down for the NAMBA NAT's? This would be a great place to learn about running and racing the R/C boats. Depending on work, I plan on being there most if not all of next week so maybe we could meet up and get you lots of hands on help