While registering with the Drug & Alcohol Clearinghouse (DACH) is not mandatory for drivers, we strongly recommend it. Registration is necessary for drivers to grant consent for pre-employment/full queries and if any violations are reported on them. Essentially, drivers seeking new employment or with reported violations must register. Additionally, drivers are required to designate their Substance Abuse Professional (SAP) to assist with the return-to-duty process. Registered drivers can also access their information in the Clearinghouse.