Where a proposed use is not specifically identified by this ordinance or the ordinance is unclear as to whether the use is allowed in a particular zone, the Staff Advisor may find the use is similar to another use that is permitted, allowed conditionally, or prohibited in the subject zone and apply the ordinance accordingly. However, uses and activities that this ordinance specifically prohibits in the subject zone, and uses and activities that the Staff Advisor finds are similar to those that are prohibited, are not allowed. Similar use rulings that require discretion on the part of City officials shall be processed following the Type I procedure, pursuant to section 18.5.1.050, except where the Staff Advisor refers a request for a similar use determination to the Planning Commission for its review and decision through a Type II procedure, pursuant to section 18.5.1.060.