Section 160. Hours to constitute a day's work

Unless otherwise provided by
  law, the following number of hours shall constitute a legal day's work:
    1. For street surface or elevated railroad employees  as  affected  by
  section  one  hundred  and  sixty-four, ten consecutive hours, including
  one-half hour for dinner.
    2. For employees  engaged  in  the  operation  of  steam  or  electric
  surface,  subway  or  elevated  railroads  where  the  mileage system of
  running trains is not in use, except those employees affected by section
  one  hundred  and  sixty-six,  ten  hours,   performed   within   twelve
  consecutive hours.
    3.  For  all other employees, except those engaged in farm or domestic
  service and those affected by subdivision four of  section  two  hundred
  and twenty, eight hours.
    This  subdivision  shall  not  prevent an agreement for overwork at an
  increased compensation, except upon work  by  or  for  the  state  or  a
  municipal  corporation,  or  by contractors or subcontractors therewith,
  and except as otherwise provided in this chapter.