68. A plan may acquire and hold fully paid preferred shares of a corporation or of a cooperative agricultural association if during each of the 5 years preceding the acquisitions, one or the other, as the case may be, has:(a) paid on its preferred shares a dividend or interest equal to at least the weighted average of the annual dividend rates or interests specified on its preferred shares; or
(b) obtained on its common shares the yield provided for in the first paragraph of section 69.
A plan may acquire and hold fully paid preferred shares of a cooperative association if during each of the 5 years preceding the acquisition, the latter has:(a) paid interest on its preferred shares or obtained a yield on them equal to at least the weighted average of the annual rates of interest or yield specified on its preferred shares; or
(b) obtained on its shares the yield provided for in the first paragraph of section 69.