http://172.19.1.196:8983/solr/secweb/select?q=Vary PTT OR "Vary PTT" OR "Differ PTT" OR "Differ Petroleum Authority of Thailand" OR "Change PTT" OR "Change Petroleum Authority of Thailand"&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
guidance on how these principles can be approached and may be delivered. While practice will vary in detail between national markets, the principles that underlie high standards are constant. Good practice