NEW pollution controls in Victoria Harbour come into force on April 1, when all discharges from business, institutional and construction activities will have to be licensed. A spokesman for the Environmental Protection Department said the control zone covered the northern shore of Hong Kong Island. The area extends from Quarry Bay and North Point, via Happy Valley and Wan Chai, to Sai Ying Pun and Kennedy Town. The new restrictions are the third and final phase of a programme which began in November 1994. John Boxall, the department's Assistant Director, said: 'This is the last phase of the Victoria Harbour water control zone to become effective. All waters in Hong Kong will now be protected under the water pollution control ordinance.'