The rules start as follows:
Notice to Owners and Sailmakers
It is impossible to foresee every conceivable innovation which may be thought of in the future and to mention every suggestion that has been ruled illegal in the past. When considering anything in connection with the boat or sails or equipment which is not within established practice in the
J/30 Class or is not clearly covered by the plans or specifications, you must assume that it is illegal, and must obtain a ruling from the Chief Measurer before attempting it.
Since triggers were not part of the original equipment they are prohibited. We ( Rules Committee) have ruled on this in the past.
If you can disable them and still use the pole that will be OK.
Larry Christy
J30 Class Measurer