The provided text offers comprehensive guidance on crafting normative prose within technical specifications, distinguishing it from informative content which merely provides explanation. It emphasizes the critical role of RFC 2119 keywords like MUST, SHOULD, and MAY for clearly indicating requirements, alongside discussions on using imperative versus descriptive writing styles to articulate these rules. The document also compares the distinct stylistic approaches found in HTML and CSS specifications, highlighting HTML's preference for detailed algorithmic instructions and CSS's more declarative, rule-based statements. Ultimately, the text presents a set of best practices for writing unambiguous, testable, and consistent normative prose, ensuring clarity for implementers and fostering interoperability.