observes the person to whom the test is administered in his performance of tasks specified by the constable, and

makes such other observations of the person’s physical state as the constable thinks expedient.

the kind of task that may be specified for the purpose of a preliminary impairment test,

the kind of observation of physical state that may be made in the course of a preliminary impairment test,

the manner in which a preliminary impairment test should be administered, and

the inferences that may be drawn from observations made in the course of a preliminary impairment test.

whether a person is unfit to drive, and

if he is, whether or not his unfitness is likely to be due to drink or drugs.

at or near the place where the requirement to co-operate with the test is imposed, or

if the constable who imposes the requirement thinks it expedient, at a police station specified by him.

the giving of approval under subsection (6), and

in particular, the kind of training that a constable should have undergone, or the kind of qualification that a constable should possess, before being approved under that subsection.