Individual Private Detective License Application Jurisdiction/authority Of Private Detective/constable?

Jurisdiction/authority of private detective/constable? - individual private detective license application

I recently received a job offer for a detective agency in the Northeast. I wonder by what authority authorized. I have reviewed a large number of pending cases and it is open and monitor tours on a national level to address important issues. in particular, that concerns me is traveling on a cruise ship as part of the task. under the authority of the detective / license sheriff and what authority? Some people have outstanding warrants for drug activity. Performance only please ......