(C) To the extent permitted by the bankruptcy laws of the United States, similar benefits from the private sector of such debtor shall be entitled to the same treatment as those specified in subparagraphs (A) and (B) of this paragraph,
provided that the exempt or nonexempt status of periodic payments from such a retirement or pension plan or system shall be as provided under subparagraph (E) of paragraph (2) of this subsection; or