(c) within itself. When such securities are so deposited, certificates representing securities of the same class of the same issuer may be merged and held in bulk in the name of the nominee of such clearing corporation or state bank, national bank, or trust company holding the securities as the depository, with any other such securities deposited in such clearing corporation or depository by any person, regardless of the ownership of such securities, and certificates of small denomination may be merged into one or more certificates of larger denomination. The records of such fiduciary and the records of such state bank, national bank, or trust company as a fiduciary or as custodian for a fiduciary shall at all times show the name of the party for whose account the securities are so deposited. Ownership of, and other interests in, such securities may be transferred by bookkeeping entries on the books of such clearing corporation, state bank, national bank, or trust company without physical delivery or alteration of certificates representing such securities. A state bank, national bank, or trust company so depositing securities pursuant to this section shall be subject to such rules and regulations as, in the case of state-chartered banks, the director and, in the case of national banking associations, the comptroller of the currency may from time to time issue. A state bank or national bank acting as custodian for a fiduciary shall, on demand by the fiduciary, certify in writing to the fiduciary the securities so deposited by such state bank or national bank in such clearing corporation or state bank, national bank, or trust company acting as such depository for the account of such fiduciary. A fiduciary shall, on demand by any party to a judicial proceeding for the settlement of such fiduciary's account or on demand by the attorney for such party, certify in writing to such party the securities deposited by such fiduciary in such clearing corporation or state bank, national bank, or trust company acting as such depository for its account as such fiduciary. This subsection shall apply to any fiduciary holding securities in its fiduciary capacity, and to any state bank or national bank holding securities as a custodian, managing agent, or custodian for a fiduciary, acting on March 14, 1973 or who thereafter may act regardless of the date of the agreement, instrument, or court order by which it is appointed and regardless of whether or not such fiduciary, custodian, managing agent, or custodian for a fiduciary owns capital stock of such clearing corporation.