Section 8(2)(c) in The U.P. Basic Education (Teachers) (Posting) Rules, 2008
(c)Mutual transfers within the district from general block of backward block and vice-versa would be permitted with the condition that the teacher on mutual transfer to a backward block shall have to serve in that block compulsorily for five years. Mutual transfers would be permitted only in case of those teachers who have more than remaining five year's service.