Unless one is a resident of Krishna-Loka, one cannot be a spiritual master. "
(SPL Mukunda Das, 10/6/1969)
"As soon as one is liberated he is immediately a resident of Krishna Loka, and anyone who knows the truth of Krishna can become Spiritual Master. That is the version of Lord Caitanya." Letter to Mukunda -- New Vrindaban 10 June, 1969