Representative district 18 shall consist of the following voting districts in Johnson county: (002760), (002770), (002780); and the following blocks in voting district (002790), tract 0523.05, block group 2, in Johnson county: block 003, block 004, block 005, block 006, block 008; and the following blocks in voting district (002800), tract 0523.05, block group 1, in Johnson county: block 000, block 001, block 002, block 003, block 004, block 005, block 006, block 007, block 008, block 009, block 010, block 011, block 012; and the following voting districts in Johnson county: (002850), (002860), (002870), (002880), (002890), (002900), (002910), (002920); and the following blocks in voting district (003030), tract 0524.19, block group 1, in Johnson county: block 000, block 001, block 002, block 003, block 004, block 005, block 006, block 007, block 008, block 009, block 010; and the following voting districts in Johnson county: (003070); and the following blocks in voting district (900490), tract 0522.01, block group 3, in Johnson county: block 000, block 001, block 002, block 004, block 005; and the following blocks in voting district (900500), tract 0522.01, block group 3, in Johnson county: block 003, block 006, block 007, block 008, block 009, block 010, block 013, block 014, block 015; and the following blocks in voting district (900510), tract 0521.01, block group 2, in Johnson county: block 005, block 006, block 007, block 008, block 009, block 010, block 011, block 012, block 013, block 016, block 017; and the following blocks in voting district (900510), tract 0522.01, block group 3, in Johnson county: block 011, block 012, block 016, block 017, block 018, block 019, block 020; and the following voting districts in Johnson county: (920370), (920500).