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San Francisco Bap :area Draft Regional Housing Needs :allocation, 4~h Revision total share of 13 percent. A similar calculation for Piedmont, which has a relatively low proportion of households in the "very low" income category yields the following results: City Jurisdiction Proportion Regional Proportion Difference Multiplier Adjustment Factor Total Share Piedmont 9 23 14 175% 24 33 As shown above, those jurisdictions that have a larger proportion of households in an income category will receive a smaller allocation of housing units in that category. Conversely, those jurisdictions that have a relatively low proportion of households in a category would receive a higher allocation of housing units in that category. The effect of this allocation scenario is that the income distribution in each jurisdiction is made to more closely match the regional distribution by taking both a jurisdiction's existing conditions and future development into account. By addressing existing concentrations of low-income households, this allocation more aggressively promote an equitable regional income distribution. The multiplier determines how aggressively the scenario functions; the higher the multiplier, the more aggressive. 3. Spheres of Influence Every city in the Bay Area has a "sphere of influence (SOI)". A city's SOI can be either contiguous with or beyond the city's boundaries. It is the areas that the city is responsible for planning, as it is the probable future boundary of the city, including areas that may eventually be annexed by the city. The SOI is designated by the county Local Area Formation Commission (LAFCO). The LAFCO influences how government responsibilities are divided among jurisdictions and service districts within a county. If there is planned household or employment growth within the unincorporated portion of an SOI during the RHNA period, the allocation methodology must include a rule for allocating housing needs to the affected city or county. Therefore, the HMC recommends that each local jurisdiction with the land-use permitting authority in a SOI should plan for the housing needed to accommodate housing growth, existing employment and employment growth in such areas. A 100 percent allocation of the housing need to the jurisdiction that has land use control over the area would ensure that the jurisdiction that plans for accommodating the housing units also receives credit for any built units during the 1tHNA period. There are differences in whether a city or county has jurisdiction over land use and development within unincorporated SOIs. In response to these variations, allocation method includes the following SOI rules: 1. In Napa, Santa Clara, Solano, and Sonoma Counties, the allocation of housing need generated by the unincorporated SOI will be assigned to the cities. 2. In Alameda and Contra Costa Counties, the allocation of housing need generated by the unincorporated SOI will be assigned to the county.' ~ The County of San Mateo Iformed a RHNA subregion) and the City and County of San Francisco lirrele~ant- have been omitted. _~ugust ?00', Page 12