Iso 24495 2 by @gazmagik · Skillet

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Iso 24495 2

Sector-specific Plain Language standard for legal communication (ISO 24495-2:2025). Applied during contract drafting, license review, and legal/compliance writing.

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iso-24495-2

Sector-specific Plain Language standard for legal communication (ISO 24495-2:2025). Applied during contract drafting, license review, and legal/compliance writing.

metadata.version: 0.7.0
metadata.iso-standard: ISO 24495-2:2025
metadata.iso-status: published

ISO 24495-2:2025 - Plain Language (Legal Communication)

Proxy status: These rules are this project's own proxies for the standard's principles, not its text. Following them is never a claim of ISO conformance.

Extends ISO 24495-1:2023 for legal documents, contractual provisions, licenses, and regulatory compliance.

Scope & Execution Boundaries

Thinking Block Exemption:
- Internal reasoning and legal analysis within thinking blocks (the thought and thinking tags) are 100% exempt from plain language constraints.
- Reason exhaustively within thinking blocks. Apply plain language rules strictly to final user-facing legal text.
Legal Enforceability Primacy:
- Plain language simplification must never alter legal rights, liabilities, or contractual enforceability. If a term of art is legally required to avoid ambiguity, retain it and provide a plain explanation.
Document Design Applies Here Too:
- A legal document is a document, so iso-24495-5 loads alongside this skill. Part 5 governs headings, navigation, chunking, signalling, and readers who cannot see the page.
- Four of the rules below cover what Part 5 leaves out: defined terms, cross-references, clause identifiers, and the summary layer. The fifth, section names, adds nothing and applies a case Part 5 already allows to the sections a contract has.

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Modal Verb Standardisation:
- Use must for mandatory obligations ("The User must pay...").
- Use must not for prohibitions ("The User must not copy...").
- Use may for discretionary permissions, as in "the User may end the agreement".
- Banned Words: Never use "shall", "should", "hereby", "hereinafter", "wherefore", or "parties of the first part".
Explicit Subject Actor Identification:
- Every obligation sentence MUST explicitly name the subject actor ("The Licensee must notify..." rather than "Notice must be provided...").
Conditional Clause Formatting:
- Format multi-condition legal clauses as structured itemised lists:
  - Trigger / Prerequisite: What condition initiates the rule.
  - Obligation / Action: What action must or may be taken.
  - Consequence: What occurs upon non-compliance.
Defined Terms:
- Define each term once, and use it unchanged everywhere after. Two words for one concept invite an argument that they mean two things.
- Put the definition where the reader first meets the term. Where a term appears in more than one section, collect the definitions in one section and point the first use at it.
- Write a term out in full where the document uses it once, rather than defining it.
- Say in words that a term is defined, and where. Capital letters are silent to a listener, so Confidential Information on its own tells them nothing.
Cross-References:
- Name what the referenced clause says, alongside its identifier. Write "the notice deadline in clause 4.2" rather than "clause 4.2".
- Keep that wording identical to the referenced clause's own heading or opening line.
- When you point at an obligation, point at the clause carrying it, never at one that only points somewhere else. A first use pointing at the collected definitions is the exception rule 4 requires, because a definition binds nobody.
Clause Identifiers:
- Number every operative clause, because a reader, a court and a counterparty must all cite the same thing. An operative clause imposes, permits or prohibits an action. Recitals, definitions and schedules are numbered by the conventions of the document, not by this rule.
- Write the identifier into the clause text rather than as list markup. Markdown numbers an ordered list 1, 2, 3, so a compound identifier such as 4.2.1 survives only when it is written in the text.
- This is the one place a legal document departs from Part 5's rule that a sequence stays an ordered list.
- A clause identifier is neither a heading nor list numbering. So it does not count against Part 5's heading limit, and Part 5's rule on numbering headings does not govern it.
- Keep an identifier for the life of the document. An amendment adds a clause, or marks one deleted, and leaves every existing number where it is, because filings, correspondence and other contracts cite those numbers.
The Summary Layer:
- Place a plain summary of the terms the reader must act on directly after Part 5's opening block. Give it the overview's own heading, because a summary of what a reader must act on is the conclusion they need before the detail, which is what Part 5 labels. Cover what they must do, what they must pay, when the agreement ends, and how to leave it. A document without one or more of those, such as a privacy policy with no payment, covers the rest. A document with no terms the reader must act on needs no summary of this shape, and Part 5 still decides whether it has an overview.
- The summary must state that the operative text governs, and must name where that text starts. A summary a reader could mistake for the agreement changes their rights, which the enforceability boundary above forbids.
- The summary must not add an obligation, newly qualify one, or leave a reader believing an obligation is gone. Where the operative text already qualifies a term, state the term together with that qualification, which Part 5 requires the overview to keep. Where stating it would take more words than the clause itself, leave the term out and point to its clause. A pointer keeps the obligation reachable, so it is not a removal.
- Map the document onto Part 5's three levels of detail. The summary is the overview, and the operative terms are the main body. Place each schedule by what it holds, because Part 5's optional detail is for what only some readers need. A schedule carrying an obligation, a payment or a limit belongs in the main body with the rest of the operative terms, whichever page it is printed on. Reserve the optional level for a schedule a reader can skip and still comply, such as a list of contacts or a specimen form.
Section Names:
- A contract's section names are the reference case Part 5 already allows, and not a new exception. A reader jumps to Payment, Termination or Liability by subject, so each keeps its subject as its name.

❌ Not aligned (Archaic Legalese):

The Licensee shall hereinafter hold harmless and indemnify the Licensor
from and against any and all claims wherefore notice has not been provided
within thirty (30) days.

✅ ISO 24495-2 Aligned:
Indemnification Notice Requirement:
1. Notice deadline: The Licensee must notify the Licensor of any claim within 30 days.
2. Consequence: If the Licensee fails to meet this deadline, the Licensee must cover all resulting losses and legal costs incurred by the Licensor.

❌ Not aligned (the summary drops conditions in the source clause):

9.1 The Customer may terminate this Agreement by giving the Supplier at
    least 30 days' written notice. If the Customer does so, the Supplier
    must refund to the Customer the fees paid for the part of the term
    that has not yet run. The refund is calculated pro rata.

Summary: You can end the Agreement and get your money back.

✅ ISO 24495-2 Aligned:
Summary of your main terms

The operative text starts at clause 9.1 below, and it governs.
- Ending the Agreement: You may end this Agreement by giving the Supplier at least 30 days' written notice.
- Refund: If you do, the Supplier must refund you the fees paid for the part of the term that has not yet run, calculated pro rata.
```
9.1 The Customer may terminate this Agreement by giving the Supplier at
    least 30 days' written notice. If the Customer does so, the Supplier
    must refund to the Customer the fees paid for the part of the term
    that has not yet run. The refund is calculated pro rata.
```