Section 4.1 "Routing Header" refers to OASIS EDXL-Distribution Element (DE) routing header, but OASIS EDXL-Distribution Element (DE) does not appear in the normative references.
Moreover, 3.4.1 EDXL Distribution Element (EDXL-DE)
"EDXL Distribution Element (EDXL-DE) V 2.0 was approved as an OASIS standard in … 2012."
At least as far as the OASIS standards page, https://www.oasis-open.org/standards
Emergency Data Exchange Language (EDXL)
Distribution Element, v. 1.0
OASIS Standard EDXL-DE v1.0, 1 May 2006
Is the only version of EDXL that is an OASIS standard.
Please check and confirm as I may be missing something. If correct, you need to revise the date reference from 2012 to 2006.