Are regulatory agencies required to report issues outside of their jurisdiction to other appropriate agencies?
In the case of OSHA and EPA, the agencies at times work together, other times separately. Both cases are shown in the quoted material below.
Note that in paragraph 2, inspectors of each agency working separately will make referrals to the other agency.
It is not clear that it would, or could, apply to all agencies because recognizing violations of other agencies regulations requires cross-training. OSHA and EPA inspectors have such a training program.
Memorandum of Understanding between The U.S. Department of Labor Occupational Safety and Health Administration and The U.S. Environmental Protection Agency Office of Enforcement
III. General Operating Procedures For Interagency Activity
EPA and OSHA may conduct joint inspections as necessary to carry out the legislative purposes of the respective statutory authorities. Such inspections may be in accordance with an annual workplan which is developed by the two agencies and identifies areas for joint initiatives. Such inspections may also be scheduled on an ad hoc basis such as in investigations following accidents or fatalities or injuries to workers resulting from reported activities or situations subject to either EPA OR OSHA jurisdiction.
EPA and OSHA inspectors, in the course of conducting separate inspections, may discover situations involving potential violations of the other agency's laws or regulations. In those instances, referrals to the appropriate office will be undertaken as described below.