Section 131(1) in Kerala Municipality Building Rules, 1999
(1)The base of the tower or poles shall have minimum 3 metres distance from the plot boundary abutting the road, whether it is proposed on land or over a building, even if the building is having less than 3 metres distance:Provided that the distance from road boundary of the accessory rooms such as equipment rooms, shelters, or generator rooms proposed over a building shall be that of the building.