xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"
1E+WWhere the building to be rebuilt or altered is the original building, the amount of gross floor space in the building as rebuilt or altered which may be used for any purpose shall not exceed by more than ten per cent. the amount of gross floor space which was last used for that purpose in the original building.