The Bureau Charter specifies the following:
Suspects under arrest for supernatural-related crimes are detained until they are tried by judges appointed by the Commission. Remember, Bureau Agents, like their FBI counterparts, may use deadly force only when necessary--when the Special Agent has a reasonable belief that the subject of such force poses an imminent danger of death or serious physical injury to the Special Agent or another person. If feasible, a verbal warning to submit to the authority of the Special Agent shall be given prior to the use of deadly force.
On the whole, the Bureau expects its Agents to be independent. Standard and extraordinary equipment is provided for each Agent along with a modest operating budget, and agents are allowed to purchase their own unusual personal equipment. Payroll runs from GS10 – GS14 (http://www.opm.gov/oca/06tables/pdf/SEA.pdf), depending on duties and seniority.