I would like to turn your attention to the bill. It's in clause 3, page 2, the definition of tobacco product. If you read the definition, you'll see that in the second sentence it mentions certain things including “a device...that is necessary for the use of that product and the parts that may be used with the device”. That's the part that would cover the heat stick device.
In terms of the heat stick that goes into the device, it's a product made of tobacco, and it's captured by the first sentence of the definition.