(section: 3 / paragraph: 1 / sub-paragraph: n/a / line: 1)
Yes, if the elastic material is wrapped around the axle it becomes the 'drive string' and would not incur a penalty if it comes free and touches the floor.
(section: 3 / paragraph: a / line: 1)
A single integral device (a single vehicle) could include a device which has two or more separate sections/energy sources even if they are dissimilar such as rubber bands and a fishing pole as they are complimenting each other to achieve a goal of greatest speed.
(section: 3 / paragraph: b / line: 1)
There is no limit as long as they all meet the "non-metallic, elastic" rule.
No, as long as the metal ferrules don't provide any energy to propel the vehicle, it is okay.
(section: 3 / paragraph: e / line: 1)
The vehicle may have a device to attach the dowel to the vehicle and permit the removal of the dowel for transportation and/or any necessary adjustment. This device must not extend more than 2 cm from the front of the dowel and would then become the foremost part of the vehicle. This attachment device must serve no purpose other than to attach and hold the dowel on the vehicle.
(section: 3e / line: 1)
By definition, a dowel is a cylindrical rod.
(section: 6 / paragraph: c / line: 1)
The vehicle may go past the the Target Line without penalty. If the vehicle goes past the Target Line the Distance Score is still the distance from the Measurement Point on the vehicle to the Target Line to the nearest 0.1 cm. It is a point (Measurement Point on the vehicle) to line (Target Line) measurement.
(section: 6 / paragraph: d / line: 2)
No, if the center tape remains completely within the vehicle's track, i.e. the Center Tape is not visible outside of either wheel of the vehicle's widest axle the Center Line Bonus will be awarded.