Home2021 Treaties and Agreements ...Bulgaria (21-216) – Agreement for Scientific and Technological Cooperation hide Bulgaria (21-216) – Agreement for Scientific and Technological Cooperation TIAS Office of Treaty Affairs February 16, 2021 Scientific and Technical Cooperation Signed at Sofia February 16, 2021; entered into force February 16, 2021. Download Agreement [942 KB] Tags Bulgaria International Law, Treaties, and Agreements Science and Technology