Singapore cracks down on agencies after ‘tampered’ Covid-19 tests emerge 22 July 2020 Shipowner’s association said any further incidents could result in a shutdown of crew changes in SingaporeAuthor: Capt. Johnhttps://www.tradewindsnews.com/regulation/singapore-cracks-down-on-agencies-after-tampered-covid-19-tests-emerge/2-1-846259