§ 1814 Application The provisions of this article are not applicable to trusts or the administration thereof

This rule simply says that the article's rules don't cover trusts or how trusts are managed. If you're dealing with a trust, you need to look at different rules to find the answers you need.

In practice, this means the procedures laid out in this particular article only apply to other matters, not to trust administration. If you're a trustee or beneficiary trying to figure out your rights or duties, this section won't help you. You'll need to find the specific rules that actually govern trusts.