Chapter 25b. Reefs for Marine Life Conservation 16 U.S. Code §1220. State applications for obsolete ships for use as offshore reefs 16 U.S. Code §1220a. Transfer of title; terms and conditions 16 U.S. Code §1220b. Obsolete ships available; number; equitable administration 16 U.S. Code §1220c. Denial of applications; finality of decision 16 U.S. Code §1220d. "Obsolete ship" defined