2023 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2022 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2020 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2019 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2017 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2016 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2015 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2014 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2013 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate; restrictions regarding persons subject to restraining order issued p

2009 Massachusetts General Laws ch. 148 sec. 20B – Certificate of competency to conduct blasting operations; application; fee; examination; issuance; duration; expiration; renewal; duplicate