or somessor Tittflts. Designations shall be in writing and may be reyeetkal in Writing by the Seer thereat it any time ptior to the qualification of thn piMen designated. (b) If at 84 note no Totstee is acting end no SUCOSISOr has taxi designated or no sacceSsor ittbobsib.em etthipsati Is avaliable to ac