Text in force at CS23-6: from CS23-5, effective 15 Aug 2017.
(a) The flight control systems are designed to:
(1) operate easily, smoothly, and positively enough to allow proper performance of their functions;
(2) protect against likely hazards.
(b) Trim systems, if installed, are designed to:
(1) protect against inadvertent, incorrect, or abrupt trim operation;
(2) provide information that is required for safe operation.
ED Decision 2017/013/R · Source