Foreign Assistance Act of 1969, Title IV, Section 234(a), Public Law 91-175, 22 U.S.C. 2191, et seq.
This section lists the legal authority upon which a program is based (acts, amendments to acts, Public Law numbers, titles, sections, Statute Codes, citations to the U.S. Code, Executive Orders, Presidential Reorganization Plans, and Memoranda from an agency head).
Regulations, Guidelines, And Literature
"OPIC Program Handbook," free.