Update eip-7092.md

ethereum · Jul 12, 2023 · ef19d49 · ef19d49
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diff --git a/EIPS/eip-7092.md b/EIPS/eip-7092.md
@@ -70,6 +70,8 @@ interface IERC7092 {
     * @notice Returns the bond symbol
     *         It is RECOMMENDED to represent the symbol as a combination of the issuer Issuer'shorter name and the maturity date
     *         Ex: If a company named Green Energy issues bonds that will mature on october 25, 2030, the bond symbol could be `GE30` or `GE2030` or `GE102530`
+    *
+    * OPTIONAL - interfaces and other contracts MUST NOT expect these values to be present. The method is used to improve usability.
     */
     function symbol() external view returns(string memory);