NOAA is updating the regulations and management plan for Gray's Reef National Marine Sanctuary (GRNMS or Sanctuary). The regulations are revised to clarify the prohibition on anchoring and add an exemption to allow the use of weighted marker buoys that are continuously tended by vessel operators during otherwise lawful fishing or diving activities, not attached to a vessel, and not capable of holding a boat at anchor. An environmental assessment has been prepared that includes analysis of the consequences of this action. A revised management plan outlining management priorities for GRNMS for the next 5-10 years has also been prepared. No changes were made from the proposed to final rule.