The election authorized under this subsection shall be made in accordance with such regulations as the Secretary shall prescribe. If such election is made with respect to any bond (described in paragraph (1)) of the taxpayer, it shall also apply to all such bonds held by the taxpayer at the beginning of the first taxable year to which the election applies and to all such bonds thereafter acquired by him and shall be binding for all subsequent taxable years with respect to all such bonds of the taxpayer, unless, on application by the taxpayer, the Secretary permits him, subject to such conditions as the Secretary deems necessary, to revoke such election. In the case of bonds held by a common trust fund, as defined in section
584
(a), the election authorized under this subsection shall be exercisable with respect to such bonds only by the common trust fund. In case of bonds held by an estate or trust, the election authorized under this subsection shall be exercisable with respect to such bonds only by the fiduciary.