Siderea posted an example of an ordered list that was hard to do with HTML. A “beautiful real-world example” that I have screenshotted here to make sure I do not render it wrong.

Screenshot taken from the original article showing a multi-level nested list items with different counter styles and elided items.

This list is formatted “by means of the creative deployment of non-semantic DIV tags with STYLE attributes. It is simply not possible to mark up something like this using OL tag, despite it being an ordered list.” Something I am not completely in agreement with. As soon as you get to bring in CSS, you can make almost any HTML element be any other HTML element.

So here follows my go at rendering the exact same list, but using just <ol> and <li> elements. (And a single <p> for the skipped sections.)

    1. Standard: Right of an individual to request restriction of uses and disclosures.
      1. A covered entity must permit an individual to request that the covered entity restrict:
        1. Uses or disclosures of protected health information about the individual to carry out treatment, payment, or health care operations; and
        2. Disclosures permitted under § 164.510(b).
      2. Except as provided in paragraph (a)(1)(vi) of this section, a covered entity is not required to agree to a restriction.

      [...iii: if you do agree, you have to keep your promise, except in emergencies...]

      1. A covered entity must agree to the request of an individual to restrict disclosure of protected health information about the individual to a health plan if:
        1. The disclosure is for the purpose of carrying out payment or health care operations and is not otherwise required by law; and
        2. The protected health information pertains solely to a health care item or service for which the individual, or person other than the health plan on behalf of the individual, has paid the covered entity in full.