Declined permit means a proffered individual permit, including a letter of permission, that an applicant has refused to accept, because he has objections to the terms and special conditions therein. A declined permit can also be an individual permit that the applicant originally accepted, but where such permit was subsequently modified by the district engineer, pursuant to 33 CFR 325.7, in such a manner that the resulting permit contains terms and special conditions that lead the applicant to decline the modified permit, provided that the applicant has not started work in waters of the United States authorized by such permit. Where an applicant declines a permit (either initial or modified), the applicant does not have a valid permit to conduct regulated activities in waters of the United States, and must not begin construction of the work requiring a Corps permit unless and until the applicant receives and accepts a valid Corps permit.
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: