In order to set up any Rate Restrictions you need to follow these steps:

1. Click on Rate Management button. By default you will have opened Best Available Rate. If you need to select different rate you may click on "Rates" button and select required rate.
2. Now you may click on "Restrictions"
3. Last minute usually requires to add Maximum "Earliness Restriction".
4. Leave Minimum Advance field blank and update Maximum Advance filled with number of days the rate should be visible prior to arrival.
5. Click Create.