Tier I marine facilities are docks and/or piers that service scheduled waterborne passenger vessels with a vessel length of 40 feet (40' = 12m) or greater. These facilities shall provide persons with disabilities unassisted access measured under nominal marine conditions throughout spring tide range or 91/2 feet (9.5' = 2996mm) whichever is less. Tier I marine facilities shall comply with the following:
521 CMR, § 18.12