except that this subparagraph shall cease to apply with respect to such savings bank or any successor institution if any deposits of any other subsidiary or affiliate of the Great Western Financial Corporation which are subject to an assessment of an insurance premium under subsection (b) or (c) of section
1727 of this title are, directly or indirectly by any device whatsoever, transferred to or acquired by such savings bank or any successor institution which would have the effect of materially reducing such premium assessments. The exemption provided by this subparagraph shall cease to apply if Great Western Financial Corporation uses such savings bank or any successor institution as a vehicle to move such Corporation from Federal Savings and Loan Insurance Corporation insurance to Federal Deposit Insurance Corporation insurance.