The Grid Connection and Congestion Management Act requires Regional Transmission Organizations (RTOs) and Independent System Operators (ISOs) to establish a new "basic access service for energy-only delivery." This service is designed to facilitate the interconnection of generating facilities by allowing them to inject electricity into the grid at the point of interconnection, subject to reliability standards, but without guaranteeing deliverability or protection from congestion-related curtailment. Under this bill, RTOs and ISOs must submit tariff revisions within 180 days to offer this new service, or their existing practices will be deemed unjust and unreasonable. The evaluation process for basic access requests is streamlined, focusing solely on studies necessary for reliable interconnection , such as thermal, voltage, and stability analyses, and explicitly excluding studies related to ensuring deliverability or preventing congestion-related curtailment. Interconnection customers opting for basic access service will bear cost responsibility only for facilities or upgrades directly required for reliable interconnection, not for those that would increase deliverability or reduce congestion. The bill also grants customers the option to have their interconnection requests evaluated independently, outside of grouped or cluster study processes, to avoid delays and accelerate the connection of new generation. Finally, the Federal Energy Regulatory Commission (FERC) is tasked with reviewing and acting on these tariff proposals within 180 days and must revise its pro forma open access transmission tariff within 18 months to integrate this basic access service. This ensures consistency, sets benchmarks for study timelines, and provides a pathway for generators to transition to other, more comprehensive interconnection services.