You have to be in contact with the rubber to begin your pitching motion. If you begin your delivery while not in contact with the rubber it’s a balk. You are better sir to make use of (2014 and prior format) rule 8.01 a comment. You may, in the wind up position, execute a step towards first and throw in an attempt to pick off the runner, however, it can not look like your normal delivery. I will not easily get used to the new rules format. The rule is found in 5.07a1 comment (2015 re-codified rules).