Special uses may be permitted in any district from which they are prohibited when it is found that said uses will not adversely affect the public health, safety, morals and general welfare of the community. Before the location or establishment thereof, or before any change of use of the premises existing at the time of the effective date of the regulations or permitted as herein provided, is made, preliminary plans in sufficient detail and a statement as to the proposed use of the buildings, structures, and premises shall be submitted to the planning commission. The commission shall hold a public hearing as provided in section 20 and shall review such plans and statements and shall, after a careful study thereof and the effect that such buildings, structures or uses will have upon the surrounding territory, permit such buildings, structures or uses where requested, provided that the public health, safety, morals, and general welfare will not be adversely affected; that ample off-street parking facilities will be provided, and that necessary safeguards will be provided for the protection of surrounding property, persons, and neighborhood values. An appeal may be taken to the city council from any decision of the commission on a special use. Any person adversely affected by a decision of the commission granting or denying a special use may appeal said decision to the city council. Said appeal must be filed within thirty (30) days from the decision of the commission appealed from. The city council shall hold a public hearing on said appeal before making its decision. Notice of said hearing shall be given by publishing three (3) times in the official publication of the City of Robstown stating the time and place of such hearing; provided, however, that the first publication shall be at least fifteen (15) days before the date of the hearing.