15 USC § 77ii
Subscriptions accepted by Corporation as loans; repayment
through Pub. L. 116-344, except Pub. Ls. 116-260 and 116-283
The Corporation may receive subscriptions from any person, foundation with a public purpose, or agency of the United States Government, and such subscriptions may, in the discretion of the board of directors, be treated as loans repayable when and as the board of directors shall determine.