Which one among the following is not correct about the Secretary-General of the Lok Sabha?

According to the Lok Sabha Secretariat and parliamentary practice (Kaul & Shakdher), the Secretary-General (SG) is the administrative head of the Secretariat. The SG acts directly under the authority and in the name of the Speaker. Statement D is correct as parliamentary manuals state all orders of the Secretariat are issued in the name of the Speaker. However, Statement C is incorrect because the SG does not function on 'delegated authority'; rather, the SG acts as an officer of the House under the Speaker's direct constitutional and statutory authority. Therefore, C is the incorrect statement.