This paper highlights the use of Situated Artificial Institution (SAI) within an hybrid, interactive, normative multi-agent system to regulate human collaboration in crisis management. Norms regulate the actions of human actors based on the dynamics of the environment in which they are situated. This dynamics result both from environment evolution and actors actions. Our objective is to couple norms to environment state to provide a context aware crisis regulation. Introducing a constitutive level between environmental and normative states provides a loosely coupling of norms with the environment. Norms are thus no more referring to environmental facts but to status functions, i.e. institutional interpretation of environmental facts through constitutive rules. We present how this declarative and distinct SAI modelling succeeds in managing the interpretation of the events while taking into account organizational context.