Subchapter I. General Provisions. § 47–1330. Definitions. § 47–1331. Tax is lien on real property; priority; application of payment; lien for deferred tax. § 47–1332. Sale of properties by Mayor; exemptions from sale. § 47–1333. Sale not subject to procurement. § 47–1334. Interest rate. § 47–1335. Issuance of regulations to carry out chapter. § 47–1336. Energy efficiency loan foreclosure.