Mark Metzner, speaking as part of MIT's IAP 2025 course on Geothermal Energy Networks, gives an overview of the regulatory landscape for ground source heat pump systems and ambient temperature loop networks. He walks through recent updates to codes and standards governing GSHPs and geothermal energy networks (GENs), with particular attention to the new edition of CSA/ANSI/IGSHPA C448-2025, the International Ground Source Heat Pump Association's standard. The talk covers what has changed in the latest standard, why ambient loop systems need their own regulatory framework distinct from conventional heating and cooling codes, and how utilities and municipalities are adapting building and energy codes to accommodate shared geothermal infrastructure. Produced with HEET, the session is aimed at engineers, planners, and utility staff working on district-scale thermal energy systems rather than general audiences, and it assumes some familiarity with geothermal heat pump technology.