Effective March 21, 2011, common carriers and freight forwarders will no longer be required to show proof of cargo filing (BMC 34). However, all existing cargo filings will remain in the FMCSA system until March 18, 2013. To read more on this issue, please visit http://www.fmcsa.dot.gov/rules-regulations/administration/rulemakings/rule-programs/rule_making_details.aspx?ruleid=308.