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B. NON-CONFORMING STRUCTURES <br /> Subject to the following regulations, any structure that lawfully existed on the <br /> effective date of this Ordinance that does not conform to all provisions herein: <br /> 1. Shall not be extended, enlarged, replaced, reconstructed, moved, or <br /> structurally altered except when required to do so by law or as to conform with <br /> the provisions of this Ordinance. <br /> 2. Notwithstanding the above, an existing non-conforming main building or <br /> structure located in an R-1, R-2, R-3 or R-5 district may be enlarged, replaced or <br /> altered, but only if such change does not lead to an increase in the non- <br /> conforming nature of the structure. No such change can be allowed if it would <br /> lead to an increase in the parking requirements for the use or uses unless on-site <br /> parking spaces can be accommodated in accordance with the Ordinance. <br /> 3. In all Districts except R-1, R-2, R-3 and R-5, no changes or structural <br /> alterations shall be permitted which would vary the yard size requirements, <br /> setback requirements, building height or bulk limitation, or the lot size or <br /> coverage limitations of a building or structure housing a non-conforming use, <br /> unless such changes conform to all the provisions of the zoning district in which <br /> such a building is located. <br /> 4. Any non-conforming building or structure damaged by fire, explosion, <br /> flood, similar act of God or by the public enemy to the extent that the cost of <br /> restoration would exceed fifty (50%) percent of the structure's assessed value at <br /> the time such event occurred may be restored or reconstructed without <br /> enlargement or extension and used as before such damage, provided: <br /> a. Restoration or reconstruction is completed and the same use <br /> resumed within twelve (12) months from the date of the damage; <br /> and <br /> b. Proof in the form of a certified land survey performed by a <br /> Professional Land Surveyor licensed by the State of Illinois shall be <br /> provided to the Director of Economic and Urban Development <br /> illustrating the pre-existing structure's footprint and setbacks from <br /> all property lines. <br /> C. NON-CONFORMING USES <br /> Subject to the following regulations, any use that lawfully existed on the effective <br /> date of this Ordinance or amendment(s)thereto, that does not conform with all <br /> provisions herein: <br />