I've been poking around online but I can't seem to find a definitive answer on this. Given the following HTML5 structure below, should I be using h2's or h3's inside of my aside element for content titles?

I know it's okay to use multiple h1's as long as they are inside a section and/or article element. But i'm not sure what I should do within my aside? I think I should stay away from multiple h1's in an aside but im not sure about h2's and h3's.

Thanks!

```
<!DOCTYPE html>
<html>
<head>
<title>Heading Tags</title>
</head>
<body>
<section>
    <header>
        <h1>Main Section</h1>
    </header>

    <article>
        <h1>Article Title 1</h1>
        <div>Some Content Here</div>
    </article>

    <article>
        <h1>Article Title 2</h1>
        <div>Some Content Here</div>
    </article>

    <article>
        <h1>Article Title 3</h1>
        <div>Some Content Here</div>
    </article>
</section>

<aside>
    <header>
        <h1>Side Bar Heading</h1>
    </header>

    <div>
        <h2>Side Content Title 1</h2>
        <div>Some Content Here</div>
    </div>

    <div>
        <h2>Side Content Title 2</h2>
        <div>Some Content Here</div>
    </div>

    <div>
        <h2>Side Content Title 3</h2>
        <div>Some Content Here</div>
    </div>
</aside>
</body>
</html>

```