A field must govern, but not from above. The LateralGovernance names the mode of regulation through which a corpus maintains coherence without central authority: not hierarchy, but distributed coordination. In the Socioplastics architecture, governance is not a function of the founder. It is a function of the corpus itself. The 3,000 nodes, 30 Books, and 60 DOIs are not administered from a center. They are coordinated through lateral connections: cross-references, scalar operations, CamelTag interactions, and dataset interoperability. The LateralGovernance makes this explicit. It identifies the mechanisms: how does the corpus prevent fragmentation without imposing uniformity? How does it allow diversity without permitting chaos? How does it coordinate the seven disciplinary fields without subordinating them to a single framework? The answer is lateral governance: regulation through connection rather than command. Node 2997 places this concept in Core VI because governance is a fundamental condition of executive operation. But the governance is not vertical. It is horizontal. The field does not have a head. It has a network. Without this concept, the field either fragments or centralizes. With it, the field achieves distributed coherence.