The preceding section, as hereby amended, shall apply to all mortgages and deeds of trust, heretofore as well as those which may be hereafter, executed and the release or discharge of any deed of trust heretofore made in accordance with said section, by the trustee named in said deed of trust or his successor, is hereby legalized and declared to be as binding upon all parties in interest as though such release or discharge had been made after the passage of this act.
W.S. 34-1-131