(i) smoke emitted from the exhaust outlets of naturally aspirated compression ignition engines which has a density of 50 Hartridge smoke units or more or a light absorption co-efficient of more than 1,61 m 1 ; or 18,57 percentage opacity; and
(i) umsi okhutshwa kwimibhobho ekhupha imisi kwizithuthi kwiinjini zoxinzelelo lwendalo nezinengxinano yomsi yeeyunithi zomsi ezingama-50 Hartridge okanye ngaphezulu okanye ukufunxa okulula okongeziweyo okungaphezu kwe-1,61 m 1; okanye 18,57 umyinge womthamo; kunye