Preliminary JDs are written indications that there may be waters of the United States on a parcel or indications of the approximate location of waters of the United States on a parcel. Preliminary JDs are advisory in nature and may not be appealed. Preliminary JDs include compliance orders that have an implicit JD, but no approved JD.
33 CFR § 331.2
The terms and definitions contained in 33 CFR Parts 320 through 330 are applicable to this part. In addition, the following terms are defined for the purposes of this part: