The Commission can change a section 170 determination in a big way only after talking to people who are interested. You can think of a section 170 determination as a decision made by the Commission about fibre fixed line access services. The Commission can change it in a small way without talking to people first. When the Commission makes a change, it must tell the providers affected by the decision as soon as possible. It must also tell them where they can find the changed decision. You can find more information about this by looking at the section 170 determination and the Telecommunications Act.