text: SSSI notification can cover any "land" within the area of the relevant nature conservation body, including dry land, land covered by fresh water.  The extent to which an SSSI/ASSI may extend seawards differs between countries. In Scotland an SSSI may include the intertidal land down to mean low water spring or to the extent of the local planning authority area, thus only limited areas of estuaries and coastal waters beyond MLWS may be included. In England, Natural England may notify an SSSI over estuarial waters and further adjacent waters in certain circumstances (section 28(1A & 1B) of the Wildlife and Countryside Act 1981 as amended by Part 2 of Annex 13 of the Marine and Coastal Access Act 2010).
  Access to SSSIs is the same as for the rest of the countryside of the relevant country. Most SSSIs/ASSIs are in private ownership and form parts of working farms, forests and estates. In Scotland, people may use their rights of responsible access to visit SSSIs.
  When designating an SSSI/ASSI, the relevant nature conservation body must formally notify the interested parties and allow a period for them to make representations before confirming the notification. When creating a new SSSI/ASSI the designation has legal effect from the date of notification. The interested parties include central government, local planning authorities, national park authorities, all the owners and occupiers of the land, relevant public bodies such as the utility providers e.g., water companies. In Scotland, NatureScot must also notify the relevant community councils and community group having registered an interest in the land.