No need to rely on FAA or someone else. They are your images, you can license them anytime you want. Just understand how it works and the value of your images.
Licensing contracts are based on usage. If you are uncomfortable with creating contracts and enforcing them, I suggest going through an agency.
The setup here is not a staffed agency. It is a mechanism for digital downloads for people with experience who want to do their own licensing. FAA takes a fee of 30 percent for supplying the mechanism.
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It is a good thing that licensing is a challenge to find because the main customer here is retail, not business clients. BTW - licensing is not "buying" images. It is more like "renting" them for a specific usage for a specific time period. Buying implies giving away the rights to the image which is something you should never do.
