http://www.legislation.gov.uk/ssi/2015/4/article/9/madeThe Lerwick Harbour Revision Order 2015enKing's Printer for Scotland2015-07-09HARBOURS, DOCKS, PIERS AND FERRIES This Order empowers Lerwick Port Authority to construct and maintain works in the Port and Harbour of Lerwick. PART II 9 Any person who intentionally obstructs any person acting under the authority of the Authority in setting out the lines of or constructing the works or who damages, moves or removes any pole, stake, station point or bench mark established for the purpose of such setting out, shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 3 on the standard scale.