Speed tests are used to substantiate challenges and rebuttals related to internet service speed and latency. The requirements detailed in the Optional Speed Test Module (Section 1.4.6 of the BEAD Model Challenge Process) govern the use of speed tests for both the regular challenge process and pre-challenge modifications outlined in Optional Module 3: Speed Test Modifications (Section 1.4.2 of the BEAD Model Challenge Process). For Eligible Entities that adopt Optional Module 3, the speed tests used to substantiate the pre-challenge modifications must align to these requirements1.