The actual text of the Constitution is the final and absolute yardstick all laws are measured against. When the Supreme Court considers the constitutionality of any law it must measure the law against the original text of the constitution and its plain meaning when it was written.
Notice of working hours/changes. Your employer must give you reasonable notice of any changes to your working hours, such as cancelling your shifts. They may request last minute changes (such as ringing you that morning to say that they do not require you to work) and you can choose to agree to this change.
(9) The standard hours of work and the maximum hours of work calculated in accordance with subsection (6) shall be reduced by 40 hours for every period of seven consecutive days, in the averaging period, during which an employee is not entitled to regular wages.6) Where the hours of work of employees are calculated as an average pursuant to subsection (1), (a) the standard hours of work of an employee shall be 40 times the number of weeks in the averaging period;