Subchapter III. Tied Aid Credit Export Subsidies 12 U.S. Code §635o. Congressional statement of purpose 12 U.S. Code §635p. Presidential mandate to negotiate; objectives 12 U.S. Code §635q. Establishment of tied aid credit program in United States Export-Import Bank 12 U.S. Code §635r. Establishment of tied aid credit program administered by Trade and Development Agency 12 U.S. Code §635s. Implementation 12 U.S. Code §635t. Definitions