In addition to the objectives prescribed in Section 18.04.010 of this title, the S study district is included in this title to achieve the following purposes:

The city planning commission or the city council may initiate reclassification of any property from any other district to an S district, in accord with the provisions of Chapter 18.136 of this title, provided that the commission or the zoning administrator is conducting or intends to conduct studies within a reasonable time for the purpose of initiating a further amendment to the ordinance codified in this chapter that would affect the property reclassified to an S district. Prior to recommending or adopting an ordinance establishing an S district, the commission or council shall specify the length of time expected to be required for study. An ordinance reclassifying property to an S district shall cause the property to be reclassified to another specified zoning district or to revert to its former zoning classification one year after the effective date of such ordinance.

No use shall be permitted and no process, equipment or material shall be employed which is found by the city planning commission to be objectionable to persons residing or working in the vicinity or injurious to property located in the vicinity by reason of odor, fumes, dust, smoke, cinders, dirt, refuse, water-carried wastes, noise, vibrations, illumination, glare, unsightliness, or traffic, or to involve any hazard of fire or explosion, provided that agricultural pursuits preexisting or authorized by conditional use permit and conducted in accord with good practice shall not be deemed a nuisance.

No use, structure or sign lawfully occupying a site immediately prior to its classification as an S district shall become nonconforming by reason of being classified in an S district.

Any use permitted by this chapter, either as a permitted use or as a conditional use may be permitted or extended, or any structure may be altered or enlarged upon the granting of a use permit in accord with the provisions of Chapter 18.124 of this title, provided that in order to allow reasonable time for special study, no application for a use permit shall be accepted for a use other than a use permitted in an R district or an extension of an existing use until property has been reclassified to an S district for 60 days. The use permit shall require that the use comply with the provisions of Chapters 18.84 and 18.96 of this title for a district specified by the use permit, or substitute regulations shall be prescribed by the use permit.

Off-street parking facilities shall be provided for each use in an S district as prescribed in Chapter 18.88 of this title.

Off-street loading facilities shall be provided for each use in an S district as prescribed in Chapter 18.92 of this title.

No sign, outdoor advertising structure, or display of any character shall be permitted in an S district, except as prescribed in Chapter 18.96 of this title.

All uses in an S district shall be subject to design review as prescribed in Chapter 18.20 of this title. Applicants are advised to confer with the zoning administrator before preparing detailed plans.