Mexico enacted a reform to its Airport Law Regulations establishing a new framework for capacity management, slot allocation, and congestion control. The pivotal change eliminates the conflict of interest where airport administrators assigned slots, replacing it with a functionally independent Slot Coordinator designated by AFAC. This Coordinator supervises the entire slot lifecycle, while the Airport Administrator assumes a purely execution role. The utilization threshold for retaining grandfather rights drops from 85% to 80%, and the new entrant definition expands to carriers holding fewer than seven daily slots. Stricter transfer conditions now mandate two equivalent seasons of operation, extending to four for new entrants. Operators serving Mexico’s congested terminals will face enhanced transparency and adjusted network planning requirements under this IATA-aligned regime.