On April 23, that applies the requirements of the August 2010 cranes and derricks in construction standard to demolition and underground work. These areas were inadvertently omitted from the original rule. 

The final rule will apply the same crane rules to underground construction and demolition projects that are being used in other construction sectors. This includes the requirement for operator certification to be completed by November 10, 2014.  

The rule is slated to go into effect on May 23. For more information on the crane rule, .