Passage: The most significant of Gorbachev's reforms in the foreign economic sector allowed foreigners to invest in the Soviet Union in the form of joint ventures with Soviet ministries, state enterprises, and cooperatives. The original version of the Soviet Joint Venture Law, which went into effect in June 1987, limited foreign shares of a Soviet venture to 49 percent and required that Soviet citizens occupy the positions of chairman and general manager. After potential Western partners complained, the government revised the regulations to allow majority foreign ownership and control. Under the terms of the Joint Venture Law, the Soviet partner supplied labor, infrastructure, and a potentially large domestic market. The foreign partner supplied capital, technology, entrepreneurial expertise, and in many cases, products and services of world competitive quality.

Question: When did joint ventures start to happen in the Soviet Union?
June 1987