README.md in rdf-vocab-3.1.8 vs README.md in rdf-vocab-3.1.9

@@ -142,17 +142,19 @@
   [tutorial][YARD-GS] or just look at the existing code for examples.
 * Don't touch the `.gemspec` or `VERSION` files. If you need to change them,
   do so on your private branch only.
 * Do note that in order for us to merge any non-trivial changes (as a rule
   of thumb, additions larger than about 15 lines of code), we need an
-  explicit [public domain dedication][PDD] on record from you.
+  explicit [public domain dedication][PDD] on record from you,
+  which you will be asked to agree to on the first commit to a repo within the organization.
+  Note that the agreement applies to all repos in the [Ruby RDF](https://github.com/ruby-rdf/) organization.
 
 ## License
 
 This is free and unencumbered public domain software. For more information,
 see <https://unlicense.org/> or the accompanying {file:LICENSE} file.
 
 [RDF]:              https://www.w3.org/RDF/
 [RDF.rb]:           https://rubydoc.info/github/ruby-rdf/rdf
 [YARD]:             https://yardoc.org/
 [YARD-GS]:          https://rubydoc.info/docs/yard/file/docs/GettingStarted.md
-[PDD]:              https://lists.w3.org/Archives/Public/public-rdf-ruby/2010May/0013.html
+[PDD]:              https://unlicense.org/#unlicensing-contributions