; (B) except as otherwise provided in paragraph (3), for purposes of sections 5595(c) and 8704(c); (C) for the purpose of section 8114(e); and (D) subject to paragraph (2) and any limitation established under paragraph (3), any other purpose that the Director of the Office of Personnel Management may by regulation prescribe. (2) Exclusions The overtime supplement described in paragraph (1) shall not be treated as part of basic pay for purposes not covered by that paragraph, including the purposes of calculating— (A) overtime pay, night pay, Sunday pay, or holiday pay under section 5542, 5545, or 5546; (B) locality-based comparability payments under section 5304 or special rate supplements under section 5305