diff --git a/History.md b/History.md
index ffa807db..edf47c76 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,4 @@
+- #819
2.16.4
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diff --git a/validator/src/main/resources/schematron/XR_30/XRechnung-CII-validation.sch b/validator/src/main/resources/schematron/XR_30/XRechnung-CII-validation.sch
index b38a931a..07b760ef 100644
--- a/validator/src/main/resources/schematron/XR_30/XRechnung-CII-validation.sch
+++ b/validator/src/main/resources/schematron/XR_30/XRechnung-CII-validation.sch
@@ -26,8 +26,29 @@
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