I'm not familiar with "Command Section" as an official Magic: The Gathering keyword or ability, and I don't want to invent rules that could mislead you.
It's possible you're thinking of something else, such as:
- The command zone — the special area where your commander (and things like emblems or conspiracies) live in Commander, and where your commander returns when it would die or be exiled (if you choose).
- Commander tax — the extra cost each time you recast your commander from the command zone.
- A specific card or mechanic with a similar name I'm not recognizing.
If you can share where you saw "Command Section" (a card name, set, or the exact text), I'll give you an accurate, Commander-focused explanation of what it does, the nuance players miss, and when it matters.