Adds 18.51.025, 18.51.035, 18.51.070, 18.51.100, 18.51.120, 18.51.130 and 18.51.150; amends 18.51.010, 18.51.020, 18.51.030, 18.51.040 and 18.51.060; amends and renumbers 18.51.049 to be 18.51.080, 18.51.050 to be 18.51.140, 18.51.053 to be 18.51.090, 18.51.055 to be 18.51.110, 18.51.070 to be 18.51.160, 18.51.075 to be 18.51.180, 18.51.080 to be 18.51.170, 18.51.100 to be 18.51.190 and 18.51.110 to be 18.51.200; repeals 18.51.047, 18.51.048, 18.51.057 and 18.51.090 re: planned residential development