Authorization operate bank accounts signing

one of client registaring education trust. Kya akele secretary ko all signing authority diya ja sakta hai ya dono president aur secretary ko signing authority dena hoga trust deed ke bank operate  condition clause mein. Kya dono mein se akele hi ko de sakte hai kya. Secretary mujse bol raha hai mujhe akele hi ko singing authority banao. Kya sahi hai as per law Pls reply my dears.