http://172.19.1.196:8983/solr/secweb/select?q=PTT level OR "PTT level" OR "PTT rank" OR "PTT grade" OR "Petroleum Authority of Thailand rank" OR "Petroleum Authority of Thailand grade"&wt=json&indent=true&facet=true&facet.field=key_filetype&facet.field=key_sitemap&facet.field=system_name&facet.field=key_keywords&hl=on&hl.fragsize=200&hl.fl=id,title_th,searchcontent_th&defType=edismax&qf=searchcontent_th&qf=id&qf=title_th^1000000&pf=title_th~5^1&pf=searchcontent_th~5^10000&ps=2&mm=100&qf=title_th_default&fq=key_sitemap%3Ainvestor&start=0&rows=10
institutional investors into 12 high-level principles, six for obligations in relation to internal governance and six concerning their external role as investors. For each of these principles, the ICGN provides