FBA Storage Fees

Hi all, trying to get a better understanding of Amazon FBA storage fees and I’ve seen some conflicting/out-of-date information. It looks like Amazon charges:

• A long-term storage free for inventory that has been in Amazon’s warehouse for 365+ days
• An aged inventory surcharge for inventory that has been in Amazon’s warehouse for 271-365 days (According to This Amazon help page)
• Another fee for certain products that have been in Amazon’s warehouse for 181+ days such as FBA small and light (According to This Amazon help page).

Is this accurate? Is everything in Amazon’s warehouse subjected to the 181+ days inventory fee or is it only certain categories of items? Is there a list of what items/categories are subjected to the 181+ inventory fee anywhere?

Thanks!