The term regional director as used herein shall mean the agent designated by the Board as the regional director for a particular region, and shall also include any agent designated by the Board as officer-in-charge of a subregional office, but the officer-in-charge shall have only such powers, duties, and functions appertaining to regional directors as shall have been duly delegated to such officer-in-charge. The term regional attorney as used herein shall mean the attorney designated as regional attorney for a particular region. [29 FR 15919, Nov. 28, 1964]