Authorities at the Department of Motor Traffic in Sri Lanka plan to conduct vehicle emission tests on motor vehicles twice year from the current once a year schedule.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sri-lankan-authorities-conduct-vehicle-emission-tests-twice-year
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/colombo-page-sri-lanka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sri-lanka
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia