Ah, I see the issue now. Defect of Form (Canon 1686) and Lack of Form are not the same thing. It is quite common for people to use “defect of form” and “lack of form” interchangeably, but they are distinct things. (I used to do so too before I understood they are not the same thing). It is also not a documentary case. I call it an “adminstrative process” but really it isn’t that either. It’s not anything at all under Canon Law. It doesn’t exist.
Canon 1686 is speaking of a **defect **of form, not a lack of form, among other impediments. I suggest you read the entire Commentary on the Code of Canon Law regarding the Documentary Case, Canon 1686.
Lack of Form isn’t **anywhere **to be found in Canon Law under the Marriage Tribunal section. There is no judge, no respondent, no petitioner, no trial, no libellus, no appeal. **It isn’t a documentary case. ** It isn’t anything at all, canonically.
It is covered under canons 1066-1067, it is part of the premarital investigation only.
The ordinaries in the US have added some requirements for parishes to follow, as is their prerogative, but they are NOT canon law requirements.
The definitive instruction can be found in Acta Apostolicae Sedis (AAS). AAS, v. 76 (1984), p. 746-747 which states: The pre-nuptial investigation suffices to determine the invalidity of a prior marriage due to lack of canonical form; a declaration of nullity via the documentary process is not required.