; and (D) to assess the influence of accountability measures on efforts to reach a negotiated settlement to the Syrian conflict during the reporting period. (c) Form The report required under subsection (a) may be submitted in unclassified or classified form, but shall include a publicly available annex. (d) Protection of witnesses and evidence The Secretary shall take due care to ensure that the identification of witnesses and physical evidence are not publicly disclosed in a manner that might place such persons at risk of harm or encourage the destruction of evidence by the Government of Syria, violent extremist groups, anti-government forces, or any other combatants or participants in the conflict. 6. Transitional justice study Not later than 180 days after the date of the enactment of this Act, the Secretary of State (acting through appropriate officials and offices, which may include the Office of Global Criminal Justice), after consultation with the Department of Justice, the United States Agency for International Development, and other appropriate Federal agencies, shall— (1) complete a study of the feasibility and desirability of potential transitional justice mechanisms for Syria, including a hybrid tribunal, to address war crimes, crimes against humanity, and genocide perpetrated in Syria beginning in March 2011; and (2) submit a detailed report of the results of the study conducted under paragraph (1), including recommendations on which transitional justice mechanisms the United States Government should support, why such mechanisms should be supported, and what type of support should be offered, to— (A) the Committee on Foreign Relations of the Senate ; (B) the Committee on Foreign Affairs of the House of Representatives ; (C) the Committee on Appropriations of the Senate