Complex sentence: However, this document was not a commentary about Ordinatio Sacerdotalis and referred to it as an example so it's statement about OS is apparently based on the presumed consensus (or misinterpretation of RAD) that OS is not ex Cathedra Infallible.
Split into simpler sentences: However, this document was not a commentary about OS and referred to it as an example. It's statement about OS is apparently based on the presumed consensus (or misinterpretation of RAD) that OS is not ex cathedra infallible.