The time period, designated by the Director, during which pilots are allowed to launch their balloons to compete in a given task or tasks No take-off may be made before the launch period, and any take-off made after the launch period, except under rule 9 7 3, will be subject to penalty of 200 task points per minute or part minute late The yellow warning flag will be raised 5 or more minutes before the end of the launch period 9 7 1