Has anyone knows how long does it takes for a performer to get an KMRB (Korea Media Regulatory Board) Approval

Question

See, I am a singer and is currently waiting an approval from KMRB, my agency did a VTR of my performance and submit it to the KMRB, does anyone of you knows how long would it take for those people at KMRB to approve my qualifications as a singer and would enable me to work at south korea