Dive summary:

• The Occupational Safety and Health Administration has put a three-year hold on the effective date of crane-operator testing rules it proposed in 2010 to take effect this year.
• OSHA's proposed rule called for testing operators for both type and capacity of cranes and derricks, which some certification firms do now but others don't, and the agency is apparently going to try to clarify that problem.
• Also remaining is ambiguity about whether certification is tantamount to being qualified to work or if crane companies can make that call themselves.

From the article:

Two testing agencies currently test by type and capacity, while two test only by type. As such, thousands of existing operator certifications would be rendered invalid in 2014. ...