Brochos 22a - Baal Keri - Three Shiurim
http://kollelbokerbeachwood.com/articles/247/1/Brochos-22a---Baal-Keri---Three-Shiurim/Page1.html
By Avrohom Adler
Published on 01/27/2009
The original decree that a baal keri should not daven or learn before immersing in a mikvah and the reason as to why it was rescinded.