Touching the tapes was an excludable offence right from the start. After the successful experiment with starting tapes at Crystal Palace in 1933 the Control Board announced that starting gates were to be installed at all tracks for the purpose of clutch-start racing. The only difference to the Crystal Palace experiment was that riders were to line up two feet behind the gate instead of one foot. Any rider touching the tapes would be sent back and, if they repeated the offence, they would be excluded from the race.
This rule meant that the tapes were only lowered as the riders were at the line. Most starters were anxious to avoid broken tapes so they were raising the tape almost as soon as they were lowered. Knowing this, riders were now edging forward as soon as the tapes came down, letting in the clutch a split second later. In one race in the Crystal Palace versus Wembley match, all four riders shot forward before the tapes had risen and had to duck underneath. To get round this, the Control Board introduced a new rule which said that the tapes were to be lowered before the riders reached the line. However there didn't seem to be any consistency regarding exclusion as, reading reports of different matches, some referees excluded riders for the offence and others didn't.