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 # Draft Specifications for EIP and ERC's
 
+## Writing Style
+
+> [!Note]
+> see <https://www.rfc-editor.org/rfc/rfc2119.txt>
+
+      The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
+      NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
+      "OPTIONAL" in this document are to be interpreted as described in
+      RFC 2119.
+
+   Note that the force of these words is modified by the requirement
+   level of the document in which they are used.
+
+1. MUST   This word, or the terms "REQUIRED" or "SHALL", mean that the
+   definition is an absolute requirement of the specification.
+
+2. MUST NOT   This phrase, or the phrase "SHALL NOT", mean that the
+   definition is an absolute prohibition of the specification.
+
+3. SHOULD   This word, or the adjective "RECOMMENDED", mean that there
+   may exist valid reasons in particular circumstances to ignore a
+   particular item, but the full implications must be understood and
+   carefully weighed before choosing a different course.
+
+4. SHOULD NOT   This phrase, or the phrase "NOT RECOMMENDED" mean that
+   there may exist valid reasons in particular circumstances when the
+   particular behavior is acceptable or even useful, but the full
+   implications should be understood and the case carefully weighed
+   before implementing any behavior described with this label.
+
+
 ## EIP Proposal for new Transaction Type and corresponding RPC
 
 ## Draft EIPS