Senatorial district 18 shall consist of the following voting districts in Jefferson county: (000020), (000040), (000050), (000070), (000080), (000090), (000100), (000110), (000120), (000130); and all of Pottawatomie county; and the following voting districts in Shawnee county: (000090), (000150), (000330), (000350), (000410), (000420), (000430), (000440), (001360), (001370), (001460), (001760), (001850), (001880), (001890), (100050), (120060), (120070), (120100); and the following blocks in voting district (12013A), tract 0024.01, block group 3, in Shawnee county: block 066; and the following blocks in voting district (12013A), tract 0036.07, block group 2, in Shawnee county: block 029; and the following voting districts in Shawnee county: (160030), (200010), (200020), (400070), (400090), (400100), (400110), (500010), (600010), (600050), (600060), (600150), (600160), (600220), (600230), (600240), (600340), (600350), (600360), (600370), (600390), (600510), (600570), (600580), (900030), (900040), (900050).