It’s been 3 years since OSHA has implemented a revision for crane operators (Subpart CC). This revision requires operators of crane equipment to be certified, qualified, or licensed.
If an audited employer program is used it can be very costly for the owner, however, the employee could not use the qualification at another place of employment.
Other alternatives are out there but need to be OSHA approved. A government entity can be used for training, testing, and licensing. These qualifications would be transferable to another company for the employee.
Subpart CC excludes boom trucks with articulating or knuckle booms but not with straight booms.
Remember there are also certain requirements when to have a qualified signal person or rigger on the job site based on various circumstances. OSHA has specifics on certification and training for forklifts along with many other loading and maintenance procedures in the workplace.
source: Professional Roofing magazine Sept 2013 (you will need to register to read the full article.)