Riggers must be a qualified person who, by possession of a recognized degree or certificate of professional standing, or who, by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating the subject matter. Also has the authorization or authority by the nature of their position to take prompt corrective measures to eliminate them. The person must be knowledgeable in the requirements of this part as applicable to the tasks assigned, including but not limited to:
• "Know and understand of the requirements for slings, rigging hardware, and below-the-hook lifting devices, including their limitations, rigging practices, associated hazards, and inspection requirements;
• "Know and understand the application of the type of hitches used;
• "Know and understand load weight estimation, center of gravity, effect of angle on rigging components, and load turning.