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Section 20A addresses operations in more than one city or town: file the bond with the State Treasurer, running to the Commonwealth, with sureties the Treasurer approves. The $20,000 statutory sum is not a ceiling if the Marshal requires additional security. Local §19 bonds have different recipients and sums; do not assume the State arrangement removes local blasting-permit requirements.

Sections 19 and 20 supply the applicable damage condition and action rules. An injured person may bring the statutory action in that person's own name and at that person's expense, subject to the employee-personal-injury exclusion and proportional-payment rule. Separately, DFS's company-certificate instructions require evidence of at least a $20,000 blasting bond or a continuation letter showing a paid-to date. The FP-083 application waives that bond-evidence requirement for work limited to research and development; do not treat that as a blanket exemption from project rules.

Purchase Now opens Propeller's Massachusetts blasting-blanket application in a new tab. Bring the written request, State §20A form and beneficiary, legal operator name, operating locations, amount including any Marshal-required addition, dates and continuation needs. Confirm the form, surety approval and filing instructions before paying. Complete the State bond filing and provide DFS's requested certificate evidence separately; retain acceptance and obtain the necessary company, individual and local approvals before work.