to invest under section 8438 of this title;

to pay benefits or purchase annuity contracts under this subchapter;

to pay the administrative expenses of the Federal Retirement Thrift Investment Management System prescribed in subchapter VII of this chapter;

to make distributions for the purposes of section 8440(b) of this title;

to make loans to employees and Members as authorized under section 8433(g) of this title; and

to purchase insurance as provided in section 8479(b)(2) of this title.

Subject to subsection (d) and paragraphs (2) and (3), sums in the Thrift Savings Fund credited to the account of an employee, Member, former employee, or former Member may not be used for, or diverted to, purposes other than for the exclusive benefit of the employee, Member, former employee, or former Member or his beneficiaries under this subchapter.

Except as provided in paragraph (3), sums in the Thrift Savings Fund may not be assigned or alienated and are not subject to execution, levy, attachment, garnishment, or other legal process. For the purposes of this paragraph, a loan made from such Fund to an employee or Member shall not be considered to be an assignment or alienation.

Moneys due or payable from the Thrift Savings Fund to any individual and, in the case of an individual who is an employee or Member (or former employee or Member), the balance in the account of the employee or Member (or former employee or Member) shall be subject to legal process for the enforcement of the individual’s legal obligations to provide child support or make alimony payments as provided in section 459 of the Social Security Act (42 U.S.C. 659), the enforcement of an order for restitution under section 3663A of title 18, forfeiture under section 8432(g)(5) of this title, an obligation of the Executive Director to make a transfer under section 415(d)(3) of the Congressional Accountability Act of 1995 (2 U.S.C. 1415(d)(3)), or an obligation of the Executive Director to make a payment to another person under section 8467 of this title, and shall be subject to a Federal tax levy under section 6331 of the Internal Revenue Code of 1986. For the purposes of this paragraph, an amount contributed for the benefit of an individual under section 8432(c)(1) (including any earnings attributable thereto) shall not be considered part of the balance in such individual’s account unless such amount is nonforfeitable, as determined under applicable provisions of section 8432(g).