Final answer:
Commercial and/or third-party weather data can satisfy the preflight action required by 14 CFR 91.103, as long as it is accurate and originates from reliable and credible sources.
Step-by-step explanation:
The weather data provided by commercial and/or third-party vendors can indeed satisfy the preflight action required by 14 CFR 91.103, provided that the data is accurate and reliable. According to 14 CFR 91.103, pilots must become familiar with all available information concerning that flight, which includes weather reports and forecasts. These commercial vendors are often used by pilots for their convenience and comprehensive data, but it's imperative for pilots to ensure the sources are up to date and from a credible provider for aviation-specific reporting and forecasting to ensure safety and compliance with Federal Aviation Regulations (FARs).