ለ) እነዚህን ሰራተኞች ደህንነቱ በተጠበቁ ተግባራት ውስጥ ዝቅተኛ መስፈርቶች በድጋሚ እንደተሟሉ እስካልተመዘገበ ድረስ.
(c) Do not use until it is acknowledged that various equipment of the laboratory have returned to their normal operating condition.