Closure Theory reinterprets the conservation laws of physics as consequences of geometric closure and global balance constraints. Rather than treating conservation of energy, momentum, and charge as independent axioms, we show that they arise naturally from the requirement that closure structures remain invariant under transformation between domains. We distinguish between intrinsic conservation in the closure domain and observable conservation in the projected domain, and we introduce the concept of curvature balance as the underlying invariant.Projection effects are shown to determine the observable form of conservation laws, including strongly suppressed sectors such as neutrino-like neutral closures. This booklet establishes the conservation framework required for the internal consistency of Closure Theory.