Final answer:
The pilot may not start the approach.
Step-by-step explanation:
When approaching to land at KGEG under part 91 on the ILS RWY 3, prior to reaching glide slope intercept, ATC advises you that the visibility is 1900 RVR. In this scenario, the pilot may not start the approach.
Visibility is an important factor when it comes to aviation operations, especially during instrument approaches. For the approach to be conducted safely, the visibility must meet certain minimums, which are specified for each category of approach. In this case, the visibility is below the minimums required for the approach, so the pilot cannot start the approach.