Section 159 of the Principal Act is amended as follows:(a) by omitting from subsection (1) "manufacturer or supplier" twice occurring and substituting "manufacturer, supplier or tester" ;(b) by omitting from subsection (2) "manufacturer or supplier" and substituting "manufacturer, supplier or tester" ;(c) by omitting from subsection (3) "manufacturer or supplier" and substituting "manufacturer, supplier or tester" ;(d) by omitting from subsection (4) "manufacturer or supplier" and substituting "manufacturer, supplier or tester" ;(e) by omitting from subsection (6) "manufacturer or supplier" and substituting "manufacturer, supplier or tester" .