Not sure of the official line on that but I vividly recall Luke McCarthy getting jammed up for a change of tactics with a horse that had only been in his stable for a few starts.
It was previously thought to be in the 'show early speed & lead' category...but after a couple of starts for him & with a host of early leavers to his inside Luke very intelligently jagged it off the gate and looked for a trail, got one, sat in for a piece and then tipped to the outside and won the race...and he still got hauled over the coals & fined under the auspices of the often quite ridiculously & incorrectly applied change of tactics rule/s.