CDP hearings are informal proceedings that provide a delinquent taxpayer with an opportunity to be heard before the IRS can levy upon his or her property in order to satisfy outstanding tax liabilities. See generally 26 U.S.C. § 6330. During the hearing, the taxpayer is permitted, inter alia, to propose collection alternatives such as a settlement or payment schedule, and the Settlement Officer ultimately must determine whether the proposed levy “balances the need for the efficient collection of taxes with the legitimate concern of the person that any collection action be no more intrusive than necessary." Id. at § 6330(c)(3). The Settlement Officer's decision generally is reviewable by the Tax Court for abuse of discretion.