High school diploma or equivalent required to sit for exam. Certification Requirements:Full CRCST Certification: Provide 400 hours of hands-on experience during the previous 5 years preceding the application; Provisional CRCST Certification: Provide 400 hours of hands-on experience within 6 months of passing the certification exam. This class WILL NOT count towards FCPS Highschool Credit. Discounts are not permitted.