50% of tested produce was found to be unsafe. In prior years, "Q-Mark" goods showed a higher prevalence of contamination, 61.5%, than they did during ThaiPAN's March 2016 survey, 57%. Q-Mark is Thailand's National Bureau of Agricultural Commodity and Food Standards (ACFS) mark of quality. In a survey of hydroponically-grown vegetables, ThaiPAN, in late-2017, tested 30 hydroponic vegetables purchased at Thai fresh markets and supermarkets. Of 30 vegetables tested, 19 contained noxious chemical levels above maximum limits. Three samples were contaminated, but at levels below the legal maximum. Eight samples were free of harmful chemicals. On 22 October 2019, the 26-member National Hazardous Substances Committee (NHSC) changed paraquat, glyphosate, and chlorpyrifos from Type 3 toxic substances to Type 4, effectively prohibiting their production, import, export, or possession. Their use will be prohibited as of 1 December 2019. On 27 November 2019, the NHSC amended that timetable, moving the date for the ban of paraquat and chlorpyrifos to 1 June 2020. They lifted the ban on glyphosate with restrictions on usage: glyphosate will be used only on six major crops: corn, cassava, sugarcane, rubber, oil palms, and fruit. It is not permitted in watershed areas and other sensitive environment zones, and farmers must submit proof of use including the type of crops and the size of their farms when purchasing glyphosate. Industry Minister Suriya Jungrungreangkit, who chairs the NHSC, said the committee reached its decision after reviewing information provided by the Department of Agriculture and the Ministry of Public Health. NCHS member Jirapon Limpananon, chair of the Pharmacy Council of Thailand, announced her resignation from the NCHS Wednesday night following the meeting. Misrepresentation In September 2016 a shipment of pork labelled "halal"—a permissible food for Muslims—was delivered to a hotel in Krabi Province. The Central Islamic Committee of Thailand (CICOT) denounced the use of a halal-certified logo on pork, saying it will take legal action against people responsible. The committee found the halal label to be fake. Under Thai laws, CICOT is responsible for certifying halal products. A survey of the quality of fish sauce sold across Thailand reported that just over one-third of the samples were not up to standards set by the Public Health Ministry. The three-year survey, from 2012 to 2015, involved 1,121 samples of fish sauce sold under 422 brands from 245 manufacturers. Of the total analysed, 410 samples, or 36.5 percent, did not meet the standard.