The basis for law is a fair and unbiased application. If some Short Term Rentals require Conditional Use Permits (CUP) compliance while other areas do not, you have an unequal application of the law. If someone violates the CUP, how can the city then hold that party in violation? Without a fair and unbiased application of the law, you will have no law. If there is a need for a CUP, then all areas need to comply. We should all comply with the same laws equally, if I remember my HS Civics correctly.