Standard

Type	Country	Organisation
RETL	China	Beijing CGC Certification Center Co., Ltd.
RETL	Korea, Republic of	Korea Institute of Materials Science (KIMS - WTRC)
RETL	Denmark	LM Wind Power A/S
RETL	United Kingdom	Offshore Renewable Energy Catapult
RECTF	Denmark	Siemens Gamesa Renewable Energy A/S – Blade Test center
RECTF	Germany	WRD Wobben Research and Development GmbH
RETL	China	SERCAL- Shanghai SERCAL New Energy Technology Co Ltd
RETL	Spain	Fundación CENER-CIEMAT (CENER)
RETL	United States of America	Massachusetts Clean Energy Center WTTC
RETL	Denmark	Blaest A/S
RETL	Germany	Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
RETL	China	National Wind Energy Testing & Certification (Tianjin)Co., Ltd.
RECTF	Italy	Bladeworks srl