contexts: Lord Howe Island Satellite image of the island ; north is up . Geography Location Lord Howe Island Group , Tasman Sea Coordinates 31 ° 33 ′ 15 '' S 159 ° 05 ′ 06 '' E ﻿ / ﻿ 31.55417 ° S 159.08500 ° E ﻿ / - 31.55417 ; 159.08500 Coordinates : 31 ° 33 ′ 15 '' S 159 ° 05 ′ 06 '' E ﻿ / ﻿ 31.55417 ° S 159.08500 ° E ﻿ / - 31.55417 ; 159.08500 Total islands 28 Major islands Lord Howe Island , Admiralty Group , Mutton Bird Islands , and Balls Pyramid Area 14.55 km ( 5.62 sq mi ) Highest elevation 875 m ( 2,871 ft ) Highest point Mount Gower Administration Australia Administrative Division Unincorporated area of New South Wales Self - governed by the Lord Howe Island Board Part of the electoral district of Port Macquarie Part of the Division of Sydney Demographics Population 382 Tourists are restricted to 400 at any time . ( 2016 census ) Pop . density 26.25 / km ( 67.99 / sq mi ) Additional information Time zone UTC + 10 : 30 ( UTC + 10 : 30 ) Summer ( DST ) UTC + 11 : 00 ( UTC + 11 ) UNESCO World Heritage Site Official name Lord Howe Island Group Type Natural Criteria vii , x Designated 1982 ( 6th session ) Reference no . 186 State Party Australia Region Asia - Pacific
name: Lord Howe Island
answers.input_text: short
answers.span_text: 1982
questions.input_text: when did lord howe island became a world heritage site