The proposed document aims to establish a baseline for hydrogen fueling station specifications and process limits for both gaseous and liquid hydrogen fueling of aircraft at the airport from small to widebody aircraft (including eCTOL, eRotor, eVTOL, LTA, etc.). Hydrogen fueling process limits (including fuel temperature, the maximum flow rate, time required, etc.) are affected by factors such as ambient temperature, fuel delivery temperature, and initial pressure in the hydrogen storage system. Also, at the airport, similar to conventional hydrocarbon fuels, there will be both mobile fueling trailers and stationary hydrogen fueling stations. Gaseous Hydrogen Fuelling and Liquid Hydrogen Fueling at cryogenic temperatures are two very different types of fuel stored in different types of vessels with specific safety mitigations. All these technical options and variants are planned to be within the scope of this report. The goal is to start with an all-encompassing report for hydrogen fueling and, after publishing, establishing a family of documents covering the various categories of fueling. This report is jointly performed with SAE AE-5CH.