erein such provisions as to redeemability; etitweitiliaiti cot otheiwisc,:as the Board of I)ireet/rs in its sole discretion 1170T determine, and..to Athotize the inottegijitc of plcdp,ing of, and to authorize and cause to be manta innfitogcs and lives upon any Rtopetty of the 4ireporziion,, mai or pursou