17.38.020 Intent. A. The city council of the city of Lakeport, pursuant to this chapter, hereby intends to regulate the cultivation of marijuana for medical purposes, including but not limited to regulations as to location of the cultivation, size of the area used for cultivation, and the use of fencing or other screening and security structures, to accommodate the needs of qualified patients and their caregivers, and in furtherance of the public necessity, convenience and general welfare. Nothing in this chapter shall be construed to authorize any use, possession, cultivation, or distribution of marijuana for nonmedical purposes. 17.38.050 Regulation of location. A. Medical Marijuana cultivation shall be prohibited on any parcel within the incorporated area of the city of Lakeport except as an accessory use to a legally established residence within a legal accessory structure on a legal parcel within the R-1, R-2, R-3, R-5 and UR zoning districts.