They
maintain that the first Americans were the Clovis people, who crossed into the New World from Asia when a fall in sea levels at the height of the last
Ice Age created a land
bridge, known as Beringia, between the two continents.
For instance, Chapter II of the State Sanitary Code, codified at 105 C.M.R. 410.452 provides: «The owner shall
maintain all means of egress at all times in a safe, operable condition and shall keep all exterior stairways, fire escapes, egress balconies and
bridges free of snow and
ice, provided however, in those instances where a dwelling has an independent means of egress, not shared with other occupants, and a written agreement so states, the occupant is responsible for
maintaining free of snow and
ice, the means of egress under his or her exclusive control.»