This record presents the Temporal Balance Law, a theoretical framework describing phase transitions in complex systems as a function of coordination constraints. The framework introduces a dimensionless control parameter, $\zeta = \mu I \tau$, capturing the interaction between coupling efficiency, interaction density, and coordination delay. System stability is maintained when $\zeta$ remains below a critical threshold $\varepsilon$; exceeding this threshold induces a transition via either collapse (quench) or modular reorganization (de-scale). The work further identifies the divergence of coordination lag variance as a general early warning signal consistent with critical slowing down. The accompanying manuscript provides the full mathematical formulation and illustrative figures, while the companion overview document offers an accessible summary of the core concepts and implications.