According to the article the WBA ordered the bout back on March 23rd, and have given the teams 30 days, from that date, to organise the bout or they will be going to purse bids.
For Knockout the chance is a long awaited opportunity to become the sole WBA champion. He had been hoping to secure a fight with South African Hekkie Budler, though Rojas's win over Budler has seen the under-rated Nicaraguan become Knockout's new focus.
For Rojas the bout will be the first defense of his title, a title that he won in the aforementioned win over Budler whilst Knockout will be looking to upgrade the interim title that he has defended 3 times, since winning it in October 2014.
(Image courtesy of wbanews.com)