https://www.mass.gov/motion-picture-operator-licensing
Motion Picture Operator Licensing | Mass.gov
The Office of Public Safety and Inspection (OPSI) regulates the operation of motion picture projectors and licensed operators of such apparatuses.
motion pictureoperator licensingmass
https://poolserviceoperators.com/pool-service-operator-licensing-requirements/
Pool Service Operator Licensing Requirements by State
Licensing requirements for pool service operators vary significantly across the United States, creating a patchwork of state, county, and municipal obligations...
pool serviceoperator licensingrequirementsstate
https://dol.wa.gov/driver-licenses-and-permits/motorcycle/motorcycle-endorsement-training-and-testing/motorcycle-operator-manual
Motorcycle Operator Manual | Washington State Department of Licensing
operator manualwashington statedepartment ofmotorcyclelicensing