(a) The determination as to whether a use is similar to uses permitted by right shall be considered as an expansion of the use regulations of the district and not as a variance applying to a particular situation. Any use found similar shall thereafter be included in the enumeration of uses permitted by right.
(b) All applications for permits for a building or use not specifically listed in any of the permitted building or use classifications in the R1, R2, R3, CB, and GC districts shall be submitted to the Planning Commission and, after approval by it, confirmed by Council in compliance with the following standards:
(1) Such use is not listed in any other classification of permitted buildings or uses;
(2) Such use is more appropriate and conforms to the basic characteristics of the classification to which it is to be added than to any other classification;
(3) Such use does not create dangers to health and safety, and does not create offensive noise, vibration, dust, heat, smoke, odor, glare or other objectionable influences to an extent greater than normally resulting from other uses listed in the classification to which it is to be added; and,
(4) Such use does not create traffic to a greater extent that the other uses listed in the classification to which it is to be added.