Standards Frontier Pitts Standards and Specifications Protect Duty ISO 9001:2015 ISO 14001:2015 ISO 45001:2018 IWA 14.1 IWA 14.2 BSi PAS 68:2013 BSi PAS 69:2013 CWA 16221 American K12 IWA 14 vs PAS 68 PAS 68 vs K12 PAS 170 PSSA Verified Accreditation Secured by Design LPCB LPS1175 Standard Gate Safety