Yes, location services are required to use the BACtrack View App whether or not it is required to record the location of the taken test. When you open the App, you will be prompted to allow the App to access your location - simply select "Only While Using the App".
The BACtrack View app will only record the location along with the test result if the setting is enabled in the app by either a self tester or monitor.
Please see the article linked below for details on how to change that setting if needed.