On any non-conforming structure or portion of a structure containing a non-conforming use, work may be done in any period of 12 consecutive months on ordinary repairs, or on repair or replacement of non-bearing walls, fixtures, wiring, or plumbing, to an extent not exceeding 10 percent of the current replacement cost to the non-conforming structure or non- conforming portion of the structure as the case may be, provided that the cubic content existing when it became nonconforming shall not be increased.
If a non-conforming structure or portion of a structure, or a structure or portion thereof containing a non-conforming use becomes physically unsafe or unlawful due to lack of repairs and maintenance, and is declared by any duly authorized official to be unsafe or unlawful by reason of physical condition, it shall not thereafter be restored, repaired, rebuilt, or used except in conformity with the regulations of the district in which it is located.
Nothing in this Zoning Code shall be deemed to prevent the strengthening or restoring to a safe condition of any building or part thereof declared to be unsafe by any official charged with protecting the public safety, upon order of such official.
(1969 Code 150.304)