A structure, or the use of a structure, or a use which was lawful before the passage of this Chapter but which is not in conformity with the provisions of this Chapter may be continued subject to the following conditions and/or limitations:
(a) No such use shall be expanded, changed, enlarged or altered in a way which increases its nonconformity.
(b) If such use is discontinued for twenty-four or more consecutive months, any future use of the building premise shall conform to this Chapter.
(c) Uses or adjuncts thereof which become nuisances shall not be entitled to continue as nonconforming uses.
(d) Any alteration, addition or repair to any existing structure, the cost of which equals or exceeds fifty percent (50%) of the market value of the structure before the start of construction of the improvement, shall be protected by floodproofing measures to fully comply with the criteria and requirements set forth in Sections 1149.26 through 1149.29.
(e) Any existing structure which has suffered damage from any cause to an extent equal to or greater than fifty percent (50%) of its market value based on its most recent real estate assessed tax evaluation, or has sustained flood related damage on two separate occasions during a ten-year period for which the cost of repairs at the time of each such flood event, on the average, equals or exceed twentyfive percent (25%) of the market value of the structure before the damage occurred, shall not be reconstructed except in full compliance with the provisions of this Chapter.