Started dogs are not required to be steady.. Dogs are brought to line on lead.. they are restrained by a lead or hand held under the collar...
as marks are shown.
A handler CAN run the dog without restraining it... if the dog breaks, its an automatic failer..
Judges during all the started tests I have run, and those I've Judged have always HIGHLY encouraged Started handlers to take advantage of the rules and restrain the dog
Junior dogs in AKC are allowed to be restrained at the line also, until release command by the judge is given..