Earlier you said that DRE training came from the United States. I'm trying to understand. You say that police officers give the training, but it must come from somewhere. It must have a scientific basis. Police officers didn't create the tests. Surely there are people from a number of disciplines who contributed to that, whether it be doctors, ophthalmologists or chemists. A lot of scientists must have contributed to that.
You're not answering my question when you say that police officers will train the DREs. It's the training as such that I need to understand, the training that you give in order to become a DRE.