diff --git a/xml2rfc/boilerplate_tlp.py b/xml2rfc/boilerplate_tlp.py
index 1a38b6f3..7469ab69 100644
--- a/xml2rfc/boilerplate_tlp.py
+++ b/xml2rfc/boilerplate_tlp.py
@@ -255,4 +255,75 @@
             </t>""",
         ],
     },
+    "6.0": {
+        # TODO: Update the source URL
+        "draft": [
+            """<t>
+            This Internet-Draft is submitted in full conformance with the
+            provisions of BCP 78 and BCP 79.
+            </t>""",
+        ],
+        "IETF": [
+            """<t>
+            Copyright (c) {year} IETF Intellectual Property Management
+            Corporation (IPMC) and the persons identified as the
+            document authors. All rights reserved.
+            </t>""",
+            """<t>
+            This document is subject to BCP 78 and the IETF IPMC's Legal
+            Provisions Relating to IETF Documents
+            (<eref target="{scheme}://trustee.ietf.org/license-info"/>) in effect on the date of
+            publication of this document. Please review these documents
+            carefully, as they describe your rights and restrictions with
+            respect to this document. Code Components extracted from this
+            document must include Revised BSD License text as described in
+            Section 4.e of the IPMC Legal Provisions and are provided without
+            warranty as described in the Revised BSD License.
+            </t>""",
+        ],
+        "alt": [
+            """<t>
+            Copyright (c) {year} IETF Intellectual Property Management
+            Corporation (IPMC) and the persons identified as the
+            document authors. All rights reserved.
+            </t>""",
+            """<t>
+            This document is subject to BCP 78 and the IETF IPMC's Legal
+            Provisions Relating to IETF Documents
+            (<eref target="{scheme}://trustee.ietf.org/license-info"/>) in effect on the date of
+            publication of this document. Please review these documents
+            carefully, as they describe your rights and restrictions with
+            respect to this document.
+            </t>""",
+        ],
+        "noModification": [
+            """<t>
+            This document may not be modified, and derivative works of it may
+            not be created, except to format it for publication as an RFC or
+            to translate it into languages other than English.
+            </t>""",
+        ],
+        "noDerivatives": [
+            """<t>
+            This document may not be modified, and derivative works of it may
+            not be created, and it may not be published except as an
+            Internet-Draft.
+            </t>""",
+        ],
+        "pre5378": [
+            """<t>
+            This document may contain material from IETF Documents or IETF
+            Contributions published or made publicly available before November
+            10, 2008. The person(s) controlling the copyright in some of this
+            material may not have granted the IETF IPMC the right to allow
+            modifications of such material outside the IETF Standards Process.
+            Without obtaining an adequate license from the person(s)
+            controlling the copyright in such materials, this document may not
+            be modified outside the IETF Standards Process, and derivative
+            works of it may not be created outside the IETF Standards Process,
+            except to format it for publication as an RFC or to translate it
+            into languages other than English.
+            </t>""",
+        ],
+    },
 }
diff --git a/xml2rfc/writers/base.py b/xml2rfc/writers/base.py
index 16cf7819..1c3b2eac 100644
--- a/xml2rfc/writers/base.py
+++ b/xml2rfc/writers/base.py
@@ -190,7 +190,7 @@ class BaseRfcWriter:
         'table_align':              'center',
         'table_style':              'full',
         'ttcol_align':              'left',
-        'ipr':                      'trust200902',
+        'ipr':                      'tpl202412',
         'submissionType':           'IETF',
         'consensus':                'no',
     }
@@ -438,6 +438,10 @@ class BaseRfcWriter:
 
     # Valid IPR attributes
     supported_ipr = [
+        'tpl202412',
+        'noModificationTpl202412',
+        'noDerivativesTpl202412',
+        'pre5378Tpl202412',
         'trust200902',
         'noModificationTrust200902',
         'noDerivativesTrust200902',
diff --git a/xml2rfc/writers/preptool.py b/xml2rfc/writers/preptool.py
index 2b0ec08d..a00fc8e3 100644
--- a/xml2rfc/writers/preptool.py
+++ b/xml2rfc/writers/preptool.py
@@ -1101,7 +1101,7 @@ def boilerplate_insert_copyright_notice(self, e, p):
         subtype = self.root.get('submissionType')
         if not ipr:
             self.die(self.root, "Missing ipr attribute on <rfc> element.")
-        if not ipr.endswith('trust200902'):
+        if not (ipr.endswith("tpl202412") or ipr.endswith("trust200902")):
             self.die(self.root, "Unknown ipr attribute: %s" % (self.root.get('ipr'), ))
         #
         if   self.date < tlp_2_start_date:
@@ -1112,11 +1112,14 @@ def boilerplate_insert_copyright_notice(self, e, p):
         elif self.date < tlp_4_start_date:
             tlp = "3.0"
             stream = "n/a"
-        else:
+        elif ipr.endswith("trust200902"):
             # The only difference between 4.0 and 5.0 is selective URL scheme,
             # which we handle using the http cutover date, through interpolation:
-            tlp = "5.0"                 
-            stream = 'IETF' if subtype == 'IETF' else 'alt'
+            tlp = "5.0"
+            stream = "IETF" if subtype == "IETF" else "alt"
+        else:
+            tlp = "6.0"
+            stream = "IETF" if subtype == "IETF" else "alt"
         format_dict = {'year': self.date.year, }
         format_dict['scheme'] = 'http' if self.date < self.boilerplate_https_date else 'https'
         section = self.element('section', numbered='false', toc='exclude', anchor='copyright')