Except as provided under subsection (c) of this section, an individual who, other than by reason of death, leaves an office for which a statement is required by § 5–601(a) of this subtitle shall file the statement within 60 days after leaving the office. The statement shall cover: the calendar year immediately preceding the year in which the individual left office, unless a statement covering that year has already been filed by the individual; and the portion of the current calendar year during which the individual held the office. This section does not require the filing of a statement if: the individual has left office to become an official in another office for which a statement is required under this subtitle; and the disclosure requirements of the new office are at least as extensive as those of the old office.