What does presumptively invalid mean?

"Presumptively invalid" refers to a legal or regulatory status where a particular action, decision, or document is assumed to be invalid unless proven otherwise. This concept often arises in contexts such as administrative law, where certain governmental actions may be regarded as lacking validity until substantial evidence is provided to support their legality or legitimacy. Essentially, the burden of proof shifts to the party asserting the validity to demonstrate that the action or decision is, in fact, valid.