NMFS approves and implements measures in Amendment 3 to the Spiny Dogfish Fishery Management Plan, which was developed by the Mid- Atlantic and New England Fishery Management Councils. The approved management measures include implementing a research set-aside program, updating essential fish habitat definitions, allowing rollover of specifications, and eliminating the seasonal allocation of the commercial quota. These administrative measures are intended to improve the implementation of the Spiny Dogfish Fishery Management Plan and provide benefits to the spiny dogfish fishery.