11. Where an employee does two or more classes of work to each of which a
different minimum rate of wages is applicable, the employer shall pay to such
employee in respect of the time respectively occupied in each such class of
work, wages at not less than the minimum rate in force in respect of each such
12. Where a person is employed on piece work for which minimum time rate and not a minimum piece rate has been fixed under this Code, the employer shall pay to such person wages at not less than the minimum time rate.