Using Medicare Images on a Website

I know using images on a website can be tricky for intellectual property reasons, and the fines can be steep for using them without proper permission. But, what types of images can we use (or not use) that are Medicare-related? I'd like to use a chart showing IRMAA amounts, the overall Medicare block diagram and Medigap plans chart from pages 7 and 11 of the Choosing a Medigap Policy guide, respectively, and a chart showing standard Part D plan benefits detailing the 4 phases of a drug plan.

Are there certain images I'm allowed to u

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