NZGD 2000 Timaru Circuit - EPSG:2126

WKT

PROJCS["NZGD_2000_Timaru_Circuit", 
	GEOGCS["GCS_NZGD_2000", 
		DATUM["D_NZGD_2000", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 400000.0], 
	PARAMETER["False_Northing", 800000.0], 
	PARAMETER["Central_Meridian", 171.0572222222222], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", -44.40194444444445], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["NZGD_2000_Timaru_Circuit", 
	BASEGEOGCRS["GCS_NZGD_2000", 
		DATUM["D_NZGD_2000", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 400000.0], 
		PARAMETER["False_Northing", 800000.0], 
		PARAMETER["Central_Meridian", 171.0572222222222], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", -44.40194444444445]], 
	CS[Cartesian, 2], 
	AXIS["Northing (Y)", north, 
		ORDER[1]], 
	AXIS["Easting (X)", east, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "2126"]]

Data from @esri/proj-codes

{
  "wkid": 2126,
  "latestWkid": 2126,
  "gcsWkid": 4167,
  "macro": "PE_PCS_NZGD_2000_TIMARU_CIRCUIT",
  "name": "NZGD_2000_Timaru_Circuit",
  "wkt": "PROJCS[\"NZGD_2000_Timaru_Circuit\",GEOGCS[\"GCS_NZGD_2000\",DATUM[\"D_NZGD_2000\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",400000.0],PARAMETER[\"False_Northing\",800000.0],PARAMETER[\"Central_Meridian\",171.0572222222222],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-44.40194444444445],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"NZGD_2000_Timaru_Circuit\",BASEGEOGCRS[\"GCS_NZGD_2000\",DATUM[\"D_NZGD_2000\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",400000.0],PARAMETER[\"False_Northing\",800000.0],PARAMETER[\"Central_Meridian\",171.0572222222222],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-44.40194444444445]],CS[Cartesian,2],AXIS[\"Northing (Y)\",north,ORDER[1]],AXIS[\"Easting (X)\",east,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"2126\"]]",
  "description": "NZGD 2000 Timaru Circuit",
  "authority": "EPSG",
  "version": "6.15(8.1.2)",
  "deprecated": "no",
  "areaname": "New Zealand - South Island - Timaru mc",
  "extent": {
    "slat": -44.98,
    "nlat": -43.35,
    "llon": 169.82,
    "rlon": 171.55
  }
}