What institution can modify its proposal during the legislative procedure? option_A: The European Parliament modifies the proposal before final adoption. option_B: Only the European Court of Justice can modify the proposal during the procedure. option_C: The Commission can modify its proposal at any time until the Council acts. option_D: Only the Council can modify the proposal during the procedure. Explanation: According to Article 294 of the Treaty on the Functioning of the European Union, the Commission can alter its proposal at any time during the procedure until the Council has acted. This is a key rule of the ordinary legislative procedure.