FMCSA has created a learning center for all things related to the 2020 Drug & Alcohol Clearing House. 

MAIN LEARNING CENTER: https://clearinghouse.fmcsa.dot.gov/Learn

FACTSHEET: https://clearinghouse.fmcsa.dot.gov/Resource/Index/Portal-Factsheet

REGISTRATION INSTRUCTIONS: https://clearinghouse.fmcsa.dot.gov/Resource/Index/Registration-Employer-Instructions

ZIP FOLDER OF PRINT MATERIALS: https://secureservercdn.net/198.71.189.51/g4w.7f4.myftpupload.com/wp-content/uploads/2019/12/fmcsa-clearing-house.zip