I think all the info you want is at their home page (relevant snippets below):
The formulation of our C-Brite is a federally approved sanitizer...we
learned last year...that sanitizers must be registered on a
State-by-State basis...neither we nor our producer is willing to
do....we have had to take the product and sell it as a cleanser
instead, just like we did with B-Brite years ago.
...sanitizers can be ‘no-rinse’ when used in the proper
concentrations...no cleansers are permitted to be labeled
‘no-rinse’...we changed the packaging on C-Brite from ‘sanitizer’ to
‘cleanser’, even though we did not change the formulation at all.
SANITIZATION: No-rinse effective sanitization requires a solution of 100 ppm available chlorine. This will be achieved by dissolving
the contents of an 0.8 ounce packet of C-Brite in 2 gallons of warm
water. Thoroughly wet all surfaces to be sanitized. Let stand at
least one minute. Drain and AIR DRY.
As for rinsing, I think as long as the water is clean and drinkable, there won't be issues with it contaminating your items. That said, I still prefer a no-rinse, wet-contact solution like Star-San.