the vegetated 70 percent or natural area builtupon surface shall be filed area. A local with the government having Register of jurisdiction within Deeds; and the watershed may (VIII)cluster transfer, in whole or development in part, its right to that meets the the 10/70 option applicable low land area to another density option local government requirements within the shall transport watershed upon stormwater submittal of a joint runoff from resolution and the review by the development Commission. When by vegetated the water supply conveyances watershed is to the composed of public maximum lands, such as extent National Forest practicable; land, local (E) A maximum of 10 governments may percent of each count the public jurisdiction's land acreage within portion of the the watershed watershed outside outside of the of the critical area as critical area in delineated on July 1, calculating the 1993 may be acreage allowed developed with new under this development provision. For local projects and governments that do expansions of not choose to use existing the high density development of up option in that WSII to 70 percent watershed, each builtupon surface project shall, to the area (the "10/70 maximum extent option") in addition practicable, to the new minimize builtupon development surface area, direct approved in stormwater runoff compliance with the away from surface appropriate waters, and requirements of incorporate best SubItem management (3)(b)(i)(A) or practices, as defined SubItem in Rule .0202 of this (3)(b)(i)(B) of this Section, to Rule. For minimize water expansions to quality impacts. If existing the local development, the government selects existing builtupon the high density surface area shall development option not be counted within that WSII toward the allowed watershed, then
the vegetated or natural area shall be filed with the Register of Deeds; and (VIII)cluster development that meets the applicable low density option requirements shall transport stormwater runoff from the development by vegetated conveyances to the maximum extent practicable; (E) A maximum of 10 percent of each jurisdiction's portion of the watershed outside of the critical area as delineated on July 1, 1993 may be developed with new development projects and expansions of existing development of up to 70 percent builtupon surface area (the "10/70 option") in addition to the new development approved in compliance with the appropriate requirements of SubItem (3)(b)(i)(A) or SubItem (3)(b)(i)(B) of this Rule. For expansions to existing development, the existing builtupon surface area shall not be counted toward the allowed 70 percent builtupon surface area. A local government having jurisdiction within the watershed may transfer, in whole or in part, its right to the 10/70 option land area to another local government within the watershed upon submittal of a joint resolution and review by the Commission. When the water supply watershed is composed of public lands, such as National Forest land, local governments may count the public land acreage within the watershed outside of the critical area in calculating the acreage allowed under this provision. For local governments that do not choose to use the high density option in that WSII watershed, each project shall, to the maximum extent practicable, minimize builtupon surface area, direct stormwater runoff away from surface waters, and incorporate best management practices, as defined in Rule .0202 of this Section, to minimize water quality impacts. If the local government selects the high density development option within that WSII watershed, then