You're right. Sometimes it can be difficult to figure out who is in charge.
Generally, it is the guy standing at the fence telling you that you can't get in.
NFPA 921-2014
29.3.1.1 Entity in Control. The interested party who has or
represents ownership of the scene OR IS IN EFFECTIVE MANAGEMENT
OF THE SITE, SCENE, OR EVIDENCE, AND IS ORGANIZING, DIRECTING,
OR CONTROLLING THE JOINT ACTIONS OF THE OTHER INTERESTED
PARTIES. The entity having control of the site should provide
notice to all known interested parties if it intends to conduct
an investigation at the site of the incident. If the entity controlling
the site does not intend to conduct an investigation at the
site, or if it fails to initiate notification, any interested party
intending to conduct such an investigation may initiate the
notification process.
Pat Kennedy, CFEI, CFPS, MIFireE
Fire and Explosion Analyst
Sarasota, Florida
[
www.kennedy-fire.com]