We introduce the Deontic Simplicial Logic (DSL), a deontic logic for group obligations grounded in simplicial complexes: vertices encode individual commitments, and higher-dimensional simplices encode the joint commitments of the groups they connect. The resulting group modality behaves like a distributed-commitment operator with a genuinely normative character: it validates achievement but not the unrestricted introspection or monotonicity familiar from its epistemic counterpart, and impurity lets the model distinguish an agent's mere absence from a configuration from an explicit commitment to the contrary. We give a sound and complete axiomatization for the group modality. We then extend DSL to the Dynamic Deontic Simplicial Logic (DDSL), which introduces action modalities modeling agents' choices among mutually exclusive commitments, with effects captured by a product update construction on simplicial models; to our knowledge, this is the first dynamic deontic logic built on simplicial complexes. Soundness and completeness for DDSL are established via reduction axioms to the static case. Throughout, we illustrate both logics with worked examples of static and dynamic multi-agent commitment scenarios.