Here are the relevant articles of the 1982 Constitution:

Article 120: In the event of serious indications of widespread acts of violence aimed at the destruction of the free democratic order established by the Constitution or of fundamental rights and freedoms, or serious deterioration of public order because of acts of violence, the Council of Ministers, after consultation with the National Security Council, may declare a state of emergency in one or more regions or throughout the country for a period not exceeding six months.

Article 121 (3): During the state of emergency, the Council of Ministers meeting under the chairmanship of the President of the Republic, may issue decrees having the force of law on matters necessitated by the state of emergency. These decrees shall 4 be published in the Official Gazette, and shall be submitted to the Turkish Grand National Assembly on the same day for approval; the time limit and procedure for their approval by the Assembly shall be indicated in the Rules of Procedure.

Article 15: Suspension of the Exercise of Fundamental Rights and Freedoms

In times of war, mobilisation, martial law, or state of emergency the exercise of fundamental rights and freedoms can be partially or entirely suspended, or measures may be taken, to the extent required by the exigencies of the situation, which derogate the guarantees embodied in the Constitution, provided that obligations under international law are not violated.