General Laws Of Massachusetts - Chapter 22C, as it applies to the Department of State Police.
Chapter 22C: Section 51 Special state police officer appointments upon petition by railroad corporation
Chapter 22C: Section 53 Swearing in of special state police officers; licenses; duration of appointment.
Chapter 22C: Section 56 Massachusetts society for prevention of cruelty to children; appointment as special officers.
Chapter 22C: Section 57 Agents of humane societies and associations; appointment as special officers.
Chapter 22C: Section 58 Port of Boston authority employees; appointment as special officers.
Chapter 22C: Section 59 Employees of mental health or mental retardation departments; appointment as special officers.
Chapter 22C: Section 60 Public health department employees; appointment as special officers.
Chapter 22C: Section 61 Massachusetts Turnpike authority employees; appointment as special officers.
Chapter 22C: Section 62 Employees of soldiers' homes; appointment as special officers.
Chapter 22C: Section 63 Employees of colleges, universities, other educational institutions and hospitals; appointment as special officers.
As it applies to campus police officers, here is a brief history of the SSPO program. This linked page is located on the Massachusetts State Police Website.
Chapter 22C: Section 64 Civil defense agency employees; appointment as special officers.
Chapter 22C: Section 65 Middlesex county sanatorium employees; appointment as special officers.
Chapter 22C: Section 66 Employment and training division employees; appointment as special officers.
Chapter 22C: Section 67 State lottery commission employees; appointment as special officers.
Chapter 22C: Section 68 Special investigations bureau employees; appointment as special officers.
Chapter 22C: Section 69 Standards of skill for special officers licensed under secs. 56--68; rules.