BR-DE-TMP1 rules
German rules the publisher has flagged as temporary — they check things the core standard leaves open, such as stating a delivery or performance date.
| BR-DE-TMP-32 | information | Eine Rechnung sollte zur Angabe des Liefer-/Leistungsdatums entweder BT-72 "Actual delivery date", BG-14 "Invoicing period" oder in jeder Rechnungsposition BG-26 "Invoice… |
Nothing is stored, and the whole invoice is checked, not just this rule. A PDF only works if it is Factur-X / ZUGFeRD — a PDF with the invoice XML inside it.