(1)    In the case of a migrant worker employed exclusively in agricultural labor as defined in s. 108.02 (2), the hours of labor shall be as follows:

      (a)    Except in an emergency, no migrant worker may be required to work or be penalized for failure to work on any premises for more than 6 days in any one week or more than 60 hours in any one week, or more than 12 hours in any one day.

      (b)    Whenever an employer permits a migrant worker to work on the premises of another employer in any one week or in any one day, the aggregate number of hours during which the migrant worker is required to work on such premises shall not exceed 60 in any one week or 12 in any one day.

      (c)    Nothing in this section shall prohibit a migrant worker from voluntarily exceeding the limits prescribed by pars. (a) and (b).

   (2)   No migrant worker may be required to work for more than 6 hours continuously without a meal period of at least 30 minutes duration unless a shift can be completed within one additional hour. The meal period need not be considered as part of the hours of labor.

   (3)   Each migrant worker not employed exclusively in agricultural labor as defined in s. 108.02 (2) shall be provided a rest period of at least 10 minutes duration within each 5 hours of continuous employment, which rest period shall be considered a part of the hours of labor.