Complex sentence: In 2011 IWRG introduced an actual "IWRG Rey del Ring Championship" that would be awarded to the winner of the tournament which could then be defended in regular matches between the annual tournaments.
Split into simpler sentences: In 2011 IWRG introduced an actual "IWRG Rey del Ring Championship" that would be awarded to the winner of the tournament. The championship could then be defended in regular matches between the annual tournaments.