5 CFR 1655.2: Eligibility for loans.

A participant can apply for a TSP general purpose or residential loan if:

(a) More than 30 business days have elapsed since the participant has repaid in full any TSP loan;

(b) The participant is in pay status;

(c) The participant is eligible to contribute to the TSP; and

(d) The participant has at least $1,000 in employee contributions and attributable earnings in his or her account. Paragraph (b) of this section shall not apply to loan requests made during a Government shutdown by participants who are furloughed or excepted from furlough due to the Government shutdown.