On June 26, 2013, Green EnviroTech Holdings Corp. entered into a letter agreement with Petrosonics Llc, which amended the terms of the funding schedule under the joint venture agreement, dated May 27, 2013 (the Joint Venture Agreement) between the parties, such that the $2,000,000 which the Company agreed to contribute within 30 days of execution of the Joint Venture Agreement will be due within 45 days of June 26, 2013.