(a) Each dual control system must be designed to withstand the force of the pilots operating in opposition, using individual pilot forces not less than the greater of--
(1) 0.75 times those obtained under Sec. 23.395; or
(2) The minimum forces specified in Sec. 23.397(b).
(b) Each dual control system must be designed to withstand the force of the pilots applied together, in the same direction, using individual pilot forces not less than 0.75 times those obtained under Sec. 23.395. [Doc. No. 27805, 61 FR 5145, Feb. 9, 1996]