Update EIP-7620: Disallow referencing by both RETURNCONTRACT and EOFCREATE

Merged by EIP-Bot.

Author: pdobacz

EIPS/eip-7620.md

@@ -103,7 +103,8 @@ We extend code section validation rules (as defined in [EIP-3670](./eip-3670.md)
 5. `RETURNCONTRACT` the subcontainer pointed to `deploy_container_index` must not contain a `RETURNCONTRACT` instruction
 6. It is an error for a container to contain both `RETURNCONTRACT` and either of `RETURN` or `STOP`
 7. It is an error for a subcontainer to never be referenced in its parent container
-8. `RJUMP`, `RJUMPI` and `RJUMPV` immediate argument value (jump destination relative offset) validation: code section is invalid in case offset points to the byte directly following either `EOFCREATE` or `RETURNCONTRACT` instruction.
+8. It is an error for a given subcontainer to be referenced by both `RETURNCONTRACT` and `EOFCREATE`
+9. `RJUMP`, `RJUMPI` and `RJUMPV` immediate argument value (jump destination relative offset) validation: code section is invalid in case offset points to the byte directly following either `EOFCREATE` or `RETURNCONTRACT` instruction.
 
 ### Data Section Lifecycle