What is the maximum percent above the full load AMP rating for setting of a 20 horsepower motor overload protective device, that is responsive to motor current, if the motor is marked for a 15 degree C temperature rise, given that modification is permitted to allow the overload device to hold the starting current?

What is the maximum percent above the full load AMP rating for setting of a 20 horsepower motor overload protective device, that is responsive to motor current, if the motor is marked for a 15 degree C temperature rise, given that modification is permitted to allow the overload device to hold the starting current?