Sec. 228.43 of Reg. BB lays out what goes in your public file versus the branch files.
For example, for small banks:
(3) Small banks. A small bank or a bank that was a small bank during the prior calendar year shall include in its public file:
(i) The bank's loan-to-deposit ratio for each quarter of the prior calendar year and, at its option, additional data on its loan-to-deposit ratio; and
(ii) The information required for other banks by paragraph (b)(1) of this section, if the bank has elected to be evaluated under the lending, investment, and service tests.
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